Physics
Review questions for Chapter 1 - 12th Advanced - Governmental - (2025-2026) |
\[1 \star\]
Which light quantity measures the amount of light falling on a surface per unit area?
Choose the correct answer
A
Luminous flux
B
Luminous intensity
C
Luminance
D
Illuminance
Click here to show the solution method
\[2 \star\]
What is the SI unit of luminous flux?
Choose the correct answer
A
Candela
B
Lux
C
Lumen
D
watt
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\[3 \star\]
Huygens' principle states that
Choose the correct answer
A
The wavelength of a wave changes when it hits a barrier
B
The wavefront consists of point sources whose tangent forms the new wavefront
C
The speed of the wave changes when it hits a barrier
D
The direction of wave propagation always changes when passing through barriers
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\[4 \star\]
How does diffraction differ from refraction?
Choose the correct answer
A
Diffraction involves bending due to medium change, refraction involves bending around obstacles
B
Both are the same phenomenon
C
Diffraction only occurs with light, refraction with all waves
D
Refraction involves bending due to medium change, diffraction involves bending around obstacles
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\[5 \star\]
What color results from mixing blue and yellow pigments?
Choose the correct answer
A
Red
B
Magenta
C
Green
D
Orange
Click here to show the solution
\[6 \star\]
When two lights mix with each other and produce white light, we call these lights
Choose the correct answer
A
Secondary lights
B
Primary lights
C
Complementary lights
D
Composite lights
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\[7 \star\]
When red and blue light are mixed, the resulting light is
Choose the correct answer
A
Cyan
B
Yellow
C
Magenta
D
White
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\[8 \star\]
Pigments are chemical substances that contain primary colors: magenta, cyan, and yellow.
When the primary colors are mixed in equal proportions, the resulting color is
Choose the correct answer
A
White
B
Brown
C
Black
D
Orange
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\[9 \star\]
When blue light is shone on a red apple inside a light-tight box with an opening, we see the apple inside the box as
Choose the correct answer
A
Red
B
Magenta
C
Cyan
D
Black
Click here to show the solution
\[10 \star\]
Polarized light of intensity
\[I₀\]
passes through a second polarizer whose axis makes an angle of 60° with the axis of the first polarizer. What is the intensity of the resulting light?
Choose the correct answer
A
I₀
B
I₀/2
C
I₀/4
D
I₀/8
Click here to show the solution
\[11 \star\]
Unpolarized light with an intensity of
\[ 32\;W/m² \] passes through two consecutive polarizers; the axis of the second is perpendicular to the axis of the first. What is the intensity of the resulting light?
Choose the correct answer
A
32 W/m²
B
16 W/m²
C
8 W/m²
D
0 W/m²
Click here to show the solution
\[12 \star\]
A star emits light with a frequency of \[f=5×10^{14}hz\] and is moving towards the Earth's surface at a speed of \[v=3×10^7 m/s\]. The apparent frequency seen by an observer on Earth is equivalent to:
Choose the correct answer
A
𝑓=6.3 ×1014 HZ
B
𝑓=5.5 ×1014 HZ
C
𝑓=5.2 ×1014 HZ
D
𝑓=6.1 ×1014 HZ
Click here to show the solution method
\[13 \star\star\]
A star emits light with a wavelength of \[λ=5×10^{-7}m\] and is moving towards the Earth's surface.
An observer on Earth sees the star emitting light with a wavelength of
\[λ_{obs}=4.5×10^{-7}m\]. The speed at which the star is moving is:
Choose the correct answer
A
𝑣=2.5 ×107 m/s
B
𝑣=2 ×107 m/s
C
𝑣=3 ×107 m/s
D
𝑣=3.5 ×107 m/s
Click here to show the solution method
\[14 \star \star\star\]
Light falls on a reflective surface as shown in the figure below. The angle between the incident ray and the surface is \[47^0\]. The angle between the incident ray and the reflected ray is equal to
Choose the correct answer
A
\[𝜃_2 = 94^0\]
B
\[𝜃_2 = 86^0\]
C
\[𝜃_2 = 47^0\]
D
\[𝜃_2 = 43^0\]
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\[15 \star \star\star\]
Two mirrors are placed perpendicularly as shown in the figure below. Light is incident on one of them at an angle of incidence of
\[40^0\]
The angle at which the light reflects off the second mirror is equal to
Choose the correct answer
A
\[𝜃_2 = 40^0\;\;\;\;\;\;\]
B
\[𝜃_2 = 35^0\;\;\;\;\;\;\]
C
\[𝜃_2 = 30^0\;\;\;\;\;\;\]
D
\[𝜃_2 = 50^0\;\;\;\;\;\;\]
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I placed a candle in front of a plane mirror. The length of the candle is 15 cm, and it is 10 cm away from the mirror. One of the following answers describes the image:
Choose the correct answer
A
he image is real, upright, its length is 15 cm, and its distance from the object is 10 cm
B
The image is virtual, upright, its length is 15 cm, and its distance from the object is 10 cm
C
The image is virtual, upright, its length is 15 cm, and its distance from the object is 20 cm
D
The image is real, upright, its length is 10 cm, and its distance from the object is 20 cm
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\[17\star\]
In the figure below, a defect occurred in a concave spherical mirror called spherical aberration. To correct the defect, the following is done:
Choose the correct answer
A
Using a parabolic mirror
B
Using small spherical mirrors in addition to secondary mirrors or lenses
C
Reducing the ratio between the mirror's diameter and its radius of curvature
D
All of the above
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\[18\star\star\]
Spherical aberration in spherical mirrors occurs because light rays reflected do not converge at the focus.
One of the following mirrors has the least spherical aberration:
Choose the correct answer
A
Mirror A
B
Mirror B
C
Mirror C
D
Mirror D
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\[19 \star\]
One of the following answers expresses the uses of concave and convex mirrors
One of the following answers expresses the uses of concave and convex mirrors
Choose the correct answer
Uses of Concave Mirrors
Uses of Convex Mirrors
A
Astronomical telescopes - Solar power ovens - Car headlights
Security surveillance systems - Car side mirrors - Traffic systems
B
Household mirror - Solar power ovens - Car headlights
Car side mirrors - Traffic systems - Medical eyeglass lenses
C
Astronomical telescopes - Solar power ovens - Car headlights
Dentist's mirror - Car side mirrors - Security surveillance systems
D
Car headlights - Solar power ovens - Makeup mirrors
Car side mirrors - Traffic systems - Camera lenses
Click here to show the solution method
\[20\star\star\]
An object was placed in front of a concave mirror at different positions, one of the following figures. One of the following positions shows a real, inverted, and magnified image.
Choose the correct answer
A
Position A
B
Position B
C
Position C
D
Position D
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\[21 \star\star\]
An object of length
\[3 cm \]
is placed at a distance of
\[ 40 cm \]
from a convex lens with a focal length of
\[ 30 cm\]
. What is the length of the formed image?
Choose the correct answer
A
4.5 cm
B
6 cm
C
9cm
D
12 cm
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\[22 \star\]
Ahmed's height is
\[1.6\;m\]
He stood in front of a concave mirror with a focal length of
\[ 20\; Cm\]
. An inverted image of him appeared with a height of
\[ 1.2 \;m\]
. The distance Ahmed is standing from the mirror equals
Choose the correct answer
A
\[ X_O = -38.2 \;\; 𝐶𝑚 \]
B
\[ X_O = 25.4 \;\; 𝐶𝑚 \]
C
\[ X_O = 46.6 \;\; 𝐶𝑚 \]
D
\[ X_O = 30.7 \;\; 𝐶𝑚 \]
Click here to show the solution method
\[23\star\]
If the magnification produced by a mirror is +0.5, which of the following is true?
Choose the correct answer
A
The image is real , inverted ,and magnified.
B
The image is real , erect, and diminished
C
The image is virtual, erect , and diminished
D
The image is virtual , inverted , and diminished
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\[24\star\]
A man stood in front of a mirror and his image appeared in the mirror as shown in the figure. The type of mirror, its characteristics, and the algebraic signs of the quantities are:
Choose the correct answer
A
\[f=-\;\; X_i=-\;\; X_O=+\]
Virtual - Erect - Magnified
Concave
B
\[f=+\;\; X_i=-\;\; X_O=+\]
Real - Erect - Magnified
Convex
C
\[f=+\;\; X_i=-\;\; X_O=+\]
Virtual - Erect - Magnified
Concave
D
\[f=-\;\; X_i=-\;\; X_O=-\]
Virtual - Erect - Magnified
Convex
Click here to show the solution method
\[25\star\]
A ruler was placed in front of a mirror, and a small, upright image appeared inside it. Therefore, the type of mirror and its characteristics are:
A
Plane mirrors converge the extensions of reflected rays
B
Parabolic Mirrors converge rays to a single point
C
Convex mirror, diverges rays
D
Concave mirror, converges rays
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\[26 \star\]
In one of the following answers, light refracts approaching the normal if it falls non-perpendicularly on the interface surface between two media
Choose the correct answer
A
Light fell from glass to water
B
Light fell from water to air
C
Light fell from a medium where the speed of light is lower to a medium where the speed of light is higher
D
Light fell from a medium with a lower refractive index to a medium with a higher refractive index
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\[27 \star\]
Light fell between two media and was refracted away from the normal. One of the following answers describes the two media.
Choose the correct answer
A
\[𝑣_1 >𝑣_2\]
B
\[𝑛_1 = 𝑛_2\]
C
\[𝑛_2 >𝑛_1\]
D
\[𝑛_1 >𝑛_2\]
Click here to show the solution method
\[28 \star\]
Light fell between two media, from a medium with a lower refractive index to a medium with a higher refractive index, and was refracted towards the normal. One of the following answers describes the wavelength and frequency.
Choose the correct answer
A
Velocity increases, wavelength increases, and frequency increases
B
Velocity decreases, wavelength decreases, frequency remains constant
C
Velocity, wavelength, and frequency remain constant
D
Velocity increases, wavelength increases, and frequency decreases
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\[29 \star\]
the following table shows the speed of light in some materials. According to the concept of refractive index, one of the following materials has the highest refractive index.ر
Material
Speed of Light
Water
2.25 × 108 m/s
Glass
2.00 × 108 m/s
Benzene
2.10 × 108 m/s
Diamond
1.24 × 108 m/s
Choose the correct answer
A
Water
B
Glass
C
Benzene
D
Diamond
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\[30 \star\]
What is the necessary condition for total internal reflection to occur?
Choose the correct answer
A
Light travels from a medium with lower refractive index to a medium with higher refractive index
B
The angle of incidence is less than the critical angle
C
Light travels from a medium with higher refractive index to a medium with lower refractive index
D
The light is polarized
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\[31 \star\]
Which of the following is NOT an application of total internal reflection?
A
Optical fibers
B
Prism binoculars
C
Magnifying glass
D
Sparkling of diamonds
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\[32 \star\]
What is the primary cause of dispersion of light in a prism?
Choose the correct answer
A
Reflection of light at different angles
B
Variation of refractive index with wavelength
C
Absorption of certain wavelengths by the prism material
D
Diffraction of light at the edges of the prism
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\[33 \star\]
In a rainbow, the phenomenon responsible for the separation of colors is:
Choose the correct answer
A
Reflection only
B
Refraction only
C
Dispersion only
D
Dispersion, refraction, and internal reflection
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\[34 \star\]
A candle was placed in front of a lens, and its image appeared as in the figure. The type of lens, its characteristics, and the algebraic signs of the quantities are:
Choose the correct answer
A
\[f=-\;\; X_i=-\;\; X_O=+\]
Virtual - Erect - Diminished
Concave
B
\[f=+\;\; X_i=-\;\; X_O=+\]
Real - Erect - Magnified
Convex
C
\[f=+\;\; X_i=-\;\; X_O=+\]
Virtual - Erect - Magnified
Concave
D
\[f=-\;\; X_i=-\;\; X_O=-\]
Virtual - Erect - Magnified
Convex
Click here to show the solution method
\[35 \star \star\]
Which of the following best describes spherical aberration in a lens?
Choose the correct answer
A
The inability of a lens to focus different wavelengths of light at the same point
B
The variation in focal length for marginal and paraxial rays
C
The distortion of image shape due to lens curvature
D
The reduction in light intensity at the image plane
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\[36 \star \]
Chromatic aberration in lenses is primarily caused by:
Choose the correct answer
A
The spherical shape of lens surfaces
B
Imperfections in lens manufacturing
C
The dependence of refractive index on wavelength
D
The finite thickness of the lens
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\[37 \star \]
Which type of lens is used to correct hyperopia (farsightedness)?
Choose the correct answer
A
Convex lens
B
Concave lens
C
Cylindrical lens
D
Bifocal lens
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\[38 \star \]
In a myopic eye, where does the image form relative to the retina?
Choose the correct answer
A
Directly on the retina
B
In front of the retina
C
Behind the retina
D
The image doesn't form at all
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\[39 \star \]
In a refracting telescope, which component is typically responsible for forming the initial real image?
Choose the correct answer
A
The diagonal mirror
B
The eyepiece
C
The field lens
D
The objective lens
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\[40\star \]
In an SLR camera, what happens to the mirror when the shutter release button is pressed?
Choose the correct answer
A
It lifts up momentarily to allow light to reach the sensor
B
It remains stationary throughout the exposure
C
It rotates to change the angle of reflection
D
It moves sideways to allow light to pass
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Answer the following questions
\[1\star \]
At a distance of 3 meters from a point source, the illuminance is 50 lux. Calculate the luminous intensity.
\[.........................................\;\;\;\;\;\;....................................\]
\[........................................\;\;\;\;\;\;....................................\]
\[.........................................\;\;\;\;\;\;....................................\]
If the distance increases to 6 meters, what should the illuminance be to maintain the same previous luminous intensity?
\[.........................................\;\;\;\;\;\;....................................\]
\[.........................................\;\;\;\;\;\;....................................\]
\[........................................\;\;\;\;\;\;....................................\]
calculate the ratio of illuminance between the point at 3 meters and the point at 6 meters.
\[.........................................\;\;\;\;\;\;....................................\]
\[........................................\;\;\;\;\;\;....................................\]
Click here to show the solution method
\[2\star\]
An object is placed 6 cm from a spherical mirror with a focal length of 10 cm,
as shown in the figure below.
Draw a ray diagram to locate the image of the object and determine the characteristics of the image.
determine the characteristics of the image.
\[..........................................\;\;\;\;\;\;........................................\]
\[..........................................\;\;\;\;\;\;........................................\]
Calculate the image distance from the mirror.
\[..........................................\;\;\;\;\;\;........................................\]
\[..........................................\;\;\;\;\;\;........................................\]
\[..........................................\;\;\;\;\;\;........................................\]
Calculate the magnification produced by the spherical mirror.
\[..........................................\;\;\;\;\;\;........................................\]
\[..........................................\;\;\;\;\;\;........................................\]
Click here to show the solution method
\[3\star\]
An object is placed 12 cm from a convex spherical mirror with a focal length of 8 cm.
as shown in the figure below.
Draw a ray diagram to locate the image of the object and determine the characteristics of the image.
determine the characteristics of the image.
\[..........................................\;\;\;\;\;\;........................................\]
\[..........................................\;\;\;\;\;\;........................................\]
Calculate the image distance from the mirror.
\[..........................................\;\;\;\;\;\;........................................\]
\[..........................................\;\;\;\;\;\;........................................\]
\[..........................................\;\;\;\;\;\;........................................\]
Calculate the magnification produced by the spherical mirror.
\[..........................................\;\;\;\;\;\;........................................\]
\[..........................................\;\;\;\;\;\;........................................\]
Click here to show the solution method
\[4\star \]
Light fell from water in which the speed of light is
2.25 × 108m/s
at an angle of incidence of 28 degrees
to glass in which the speed of light is
1.81 × 108m/s
Complete the path of the light ray in the glass
Calculate the refractive index of water and the refractive index of glass
given that the speed of light in vacuum is
\[C=3×10^8\;\;m/s\]
\[.........................................\;\;\;\;\;\;....................................\]
\[........................................\;\;\;\;\;\;....................................\]
\[.........................................\;\;\;\;\;\;....................................\]
\[........................................\;\;\;\;\;\;....................................\]
Calculate the angle of refraction of light using Snell's law
\[.........................................\;\;\;\;\;\;....................................\]
\[........................................\;\;\;\;\;\;....................................\]
\[.........................................\;\;\;\;\;\;....................................\]
\[........................................\;\;\;\;\;\;....................................\]
Click here to show the solution method
\[5\star\]
An object of height
\[ 4 cm\] is placed on the principal axis of a concave lens with a focal length of
\[10 cm\] at a distance of
\[15 cm\] from its optical center.
Find the distance of the image from the lens
\[..........................................\;\;\;\;\;\;........................................\]
\[..........................................\;\;\;\;\;\;........................................\]
\[..........................................\;\;\;\;\;\;........................................\]
\[..........................................\;\;\;\;\;\;........................................\]
Calculate the magnification of the image and write its characteristics
\[..........................................\;\;\;\;\;\;........................................\]
\[..........................................\;\;\;\;\;\;........................................\]
\[..........................................\;\;\;\;\;\;........................................\]
\[..........................................\;\;\;\;\;\;........................................\]
Calculate the height of the image
\[..........................................\;\;\;\;\;\;........................................\]
\[..........................................\;\;\;\;\;\;........................................\]
Draw the location of image formation
on the figure
Click here to show the solution method
\[6\star\]
A convex lens with a focal length of 25 cm forms a real, inverted image of an object. If the magnification is 0.5, what is the object distance from the lens?؟
\[..........................................\;\;\;\;\;\;........................................\]
\[..........................................\;\;\;\;\;\;........................................\]
\[..........................................\;\;\;\;\;\;........................................\]
\[..........................................\;\;\;\;\;\;........................................\]
\[..........................................\;\;\;\;\;\;........................................\]
\[..........................................\;\;\;\;\;\;........................................\]
\[..........................................\;\;\;\;\;\;........................................\]
\[..........................................\;\;\;\;\;\;........................................\]
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Which light quantity measures the amount of light falling on a surface per unit area?
Choose the correct answer
Click here to show the solution method
What is the SI unit of luminous flux?
Choose the correct answer
Click here to show the solution method
Huygens' principle states that
Choose the correct answer
Click here to show the solution
How does diffraction differ from refraction?
Choose the correct answer
Click here to show the solution method
What color results from mixing blue and yellow pigments?
Choose the correct answer
Click here to show the solution
When two lights mix with each other and produce white light, we call these lights
Choose the correct answer
Click here to show the solution
When red and blue light are mixed, the resulting light is
Choose the correct answer
Click here to show the solution
Pigments are chemical substances that contain primary colors: magenta, cyan, and yellow.
When the primary colors are mixed in equal proportions, the resulting color is
Choose the correct answer
Click here to show the solution
When blue light is shone on a red apple inside a light-tight box with an opening, we see the apple inside the box as
Choose the correct answer
Click here to show the solution
Polarized light of intensity \[I₀\] passes through a second polarizer whose axis makes an angle of 60° with the axis of the first polarizer. What is the intensity of the resulting light?
Choose the correct answer
Click here to show the solution
Unpolarized light with an intensity of \[ 32\;W/m² \] passes through two consecutive polarizers; the axis of the second is perpendicular to the axis of the first. What is the intensity of the resulting light?
Choose the correct answer
Click here to show the solution
A star emits light with a frequency of \[f=5×10^{14}hz\] and is moving towards the Earth's surface at a speed of \[v=3×10^7 m/s\]. The apparent frequency seen by an observer on Earth is equivalent to:
Choose the correct answer
Click here to show the solution method
A star emits light with a wavelength of \[λ=5×10^{-7}m\] and is moving towards the Earth's surface.
An observer on Earth sees the star emitting light with a wavelength of
\[λ_{obs}=4.5×10^{-7}m\]. The speed at which the star is moving is:
Choose the correct answer
Click here to show the solution method
Light falls on a reflective surface as shown in the figure below. The angle between the incident ray and the surface is \[47^0\]. The angle between the incident ray and the reflected ray is equal to
Choose the correct answer
Click here to show the solution method
Two mirrors are placed perpendicularly as shown in the figure below. Light is incident on one of them at an angle of incidence of \[40^0\] The angle at which the light reflects off the second mirror is equal to
Choose the correct answer
Click here to show the solution method
I placed a candle in front of a plane mirror. The length of the candle is 15 cm, and it is 10 cm away from the mirror. One of the following answers describes the image:
Choose the correct answer
Click here to show the solution method
In the figure below, a defect occurred in a concave spherical mirror called spherical aberration. To correct the defect, the following is done:
Choose the correct answer
Click here to show the solution method
Spherical aberration in spherical mirrors occurs because light rays reflected do not converge at the focus.
One of the following mirrors has the least spherical aberration:
Choose the correct answer
Click here to show the solution method
One of the following answers expresses the uses of concave and convex mirrors
One of the following answers expresses the uses of concave and convex mirrors
Choose the correct answer
| Uses of Concave Mirrors | Uses of Convex Mirrors |
|---|---|
| Astronomical telescopes - Solar power ovens - Car headlights | Security surveillance systems - Car side mirrors - Traffic systems |
| Household mirror - Solar power ovens - Car headlights | Car side mirrors - Traffic systems - Medical eyeglass lenses |
| Astronomical telescopes - Solar power ovens - Car headlights | Dentist's mirror - Car side mirrors - Security surveillance systems |
| Car headlights - Solar power ovens - Makeup mirrors | Car side mirrors - Traffic systems - Camera lenses |
Click here to show the solution method
An object was placed in front of a concave mirror at different positions, one of the following figures. One of the following positions shows a real, inverted, and magnified image.
Choose the correct answer
Click here to show the solution method
An object of length \[3 cm \] is placed at a distance of \[ 40 cm \] from a convex lens with a focal length of \[ 30 cm\] . What is the length of the formed image?
Choose the correct answer
Click here to show the solution method
Ahmed's height is \[1.6\;m\] He stood in front of a concave mirror with a focal length of \[ 20\; Cm\] . An inverted image of him appeared with a height of \[ 1.2 \;m\] . The distance Ahmed is standing from the mirror equals
Choose the correct answer
Click here to show the solution method
If the magnification produced by a mirror is +0.5, which of the following is true?
Choose the correct answer
Click here to show the solution method
A man stood in front of a mirror and his image appeared in the mirror as shown in the figure. The type of mirror, its characteristics, and the algebraic signs of the quantities are:
Choose the correct answer
| \[f=-\;\; X_i=-\;\; X_O=+\] | Virtual - Erect - Magnified | Concave |
| \[f=+\;\; X_i=-\;\; X_O=+\] | Real - Erect - Magnified | Convex |
| \[f=+\;\; X_i=-\;\; X_O=+\] | Virtual - Erect - Magnified | Concave |
| \[f=-\;\; X_i=-\;\; X_O=-\] | Virtual - Erect - Magnified | Convex |
Click here to show the solution method
Click here to show the solution method
In one of the following answers, light refracts approaching the normal if it falls non-perpendicularly on the interface surface between two media
Choose the correct answer
Click here to show the solution method
Light fell between two media and was refracted away from the normal. One of the following answers describes the two media.
Choose the correct answer
Click here to show the solution method
Light fell between two media, from a medium with a lower refractive index to a medium with a higher refractive index, and was refracted towards the normal. One of the following answers describes the wavelength and frequency.
Choose the correct answer
Click here to show the solution method
the following table shows the speed of light in some materials. According to the concept of refractive index, one of the following materials has the highest refractive index.ر
| Material | Speed of Light |
|---|---|
| Water | 2.25 × 108 m/s |
| Glass | 2.00 × 108 m/s |
| Benzene | 2.10 × 108 m/s |
| Diamond | 1.24 × 108 m/s |
Choose the correct answer
Click here to show the solution method
What is the necessary condition for total internal reflection to occur?
Choose the correct answer
Click here to show the solution method
Click here to show the solution method
What is the primary cause of dispersion of light in a prism?
Choose the correct answer
Click here to show the solution method
In a rainbow, the phenomenon responsible for the separation of colors is:
Choose the correct answer
Click here to show the solution method
A candle was placed in front of a lens, and its image appeared as in the figure. The type of lens, its characteristics, and the algebraic signs of the quantities are:
Choose the correct answer
| \[f=-\;\; X_i=-\;\; X_O=+\] | Virtual - Erect - Diminished | Concave |
| \[f=+\;\; X_i=-\;\; X_O=+\] | Real - Erect - Magnified | Convex |
| \[f=+\;\; X_i=-\;\; X_O=+\] | Virtual - Erect - Magnified | Concave |
| \[f=-\;\; X_i=-\;\; X_O=-\] | Virtual - Erect - Magnified | Convex |
Click here to show the solution method
Which of the following best describes spherical aberration in a lens?
Choose the correct answer
Click here to show the solution method
Chromatic aberration in lenses is primarily caused by:
Choose the correct answer
Click here to show the solution method
Choose the correct answer
Click here to show the solution method
Choose the correct answer
Click here to show the solution method
In a refracting telescope, which component is typically responsible for forming the initial real image?
Choose the correct answer
Click here to show the solution method
Choose the correct answer
Click here to show the solution method
Answer the following questions
At a distance of 3 meters from a point source, the illuminance is 50 lux. Calculate the luminous intensity.
\[.........................................\;\;\;\;\;\;....................................\]
\[........................................\;\;\;\;\;\;....................................\]
\[.........................................\;\;\;\;\;\;....................................\]
If the distance increases to 6 meters, what should the illuminance be to maintain the same previous luminous intensity?
\[.........................................\;\;\;\;\;\;....................................\]
\[.........................................\;\;\;\;\;\;....................................\]
\[........................................\;\;\;\;\;\;....................................\]
calculate the ratio of illuminance between the point at 3 meters and the point at 6 meters.
\[.........................................\;\;\;\;\;\;....................................\]
\[........................................\;\;\;\;\;\;....................................\]
An object is placed 6 cm from a spherical mirror with a focal length of 10 cm,
An object is placed 12 cm from a convex spherical mirror with a focal length of 8 cm.
Light fell from water in which the speed of light is
An object of height
\[ 4 cm\] is placed on the principal axis of a concave lens with a focal length of
\[10 cm\] at a distance of
\[15 cm\] from its optical center.
A convex lens with a focal length of 25 cm forms a real, inverted image of an object. If the magnification is 0.5, what is the object distance from the lens?؟
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as shown in the figure below.
Draw a ray diagram to locate the image of the object and determine the characteristics of the image.
determine the characteristics of the image.
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Calculate the image distance from the mirror.
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Calculate the magnification produced by the spherical mirror.
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as shown in the figure below.
Draw a ray diagram to locate the image of the object and determine the characteristics of the image.
determine the characteristics of the image.
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Calculate the image distance from the mirror.
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Calculate the magnification produced by the spherical mirror.
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2.25 × 108m/s
at an angle of incidence of 28 degrees
to glass in which the speed of light is
1.81 × 108m/s
Complete the path of the light ray in the glass
Calculate the refractive index of water and the refractive index of glass
given that the speed of light in vacuum is
\[C=3×10^8\;\;m/s\]
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Calculate the angle of refraction of light using Snell's law
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Find the distance of the image from the lens
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Calculate the magnification of the image and write its characteristics
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Calculate the height of the image
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Draw the location of image formation
on the figure
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