Class 10 Physics Light
Important Multiple Choice Questions
Shruthi YR
11/30/202410 min read
Multiple Choice Questions:
What is the angle of incidence when a light ray strikes a plane mirror at an angle of 40° to the normal?
(a) 40°
(b) 80°
(c) 60°
(d) 20°
Which of the following surfaces will reflect light most efficiently?
(a) Black surface
(b) White surface
(c) Shiny surface
(d) Rough surface
The bending of light when it passes from one medium to another is known as:
(a) Reflection
(b) Diffraction
(c) Refraction
(d) Dispersion
The phenomenon responsible for the splitting of white light into colors is called:
(a) Refraction
(b) Reflection
(c) Dispersion
(d) Polarization
A convex mirror always forms:
(a) Real, inverted image
(b) Virtual, erect image
(c) Virtual, inverted image
(d) Real, erect image
Which of the following is used in the formation of a rainbow?
(a) Dispersion
(b) Refraction
(c) Diffraction
(d) Both a and b
A concave mirror is used in:
(a) Shaving mirrors
(b) Car headlights
(c) Solar cookers
(d) All of the above
The angle of refraction is 0° when light enters a medium with a refractive index of:
(a) 1
(b) 0
(c) 2
(d) 1.5
Which type of lens is used to correct hypermetropia?
(a) Concave lens
(b) Convex lens
(c) Cylindrical lens
(d) None of the above
The power of a lens is the reciprocal of its:
(a) Focal length
(b) Refractive index
(c) Curvature
(d) Diameter
The bending of light around the edges of an obstacle is called:
(a) Reflection
(b) Refraction
(c) Diffraction
(d) Dispersion
A real image is formed when the object is placed:
(a) Between the focus and the lens
(b) Beyond 2F of a convex lens
(c) At the focus of a concave mirror
(d) At the focus of a convex mirror
What happens to the focal length of a lens when its power increases?
(a) It increases
(b) It decreases
(c) It remains the same
(d) It becomes zero
In a concave lens, the image formed is:
(a) Always real
(b) Always virtual
(c) Both real and virtual
(d) None of the above
The focal length of a convex lens is:
(a) Positive
(b) Negative
(c) Zero
(d) Undefined
The image formed by a convex lens when the object is at 2F is:
(a) Real, inverted, and of the same size as the object
(b) Virtual, upright, and diminished
(c) Real, inverted, and diminished
(d) Real, upright, and magnified
The dispersion of light into a spectrum of colors occurs when:
(a) Light passes through a prism
(b) Light passes through a convex lens
(c) Light is reflected from a surface
(d) Light is absorbed by a body
Which of the following is used as a magnifying glass?
(a) Concave lens
(b) Convex lens
(c) Plane mirror
(d) Concave mirror
The real image formed by a concave mirror is:
(a) Erect and diminished
(b) Erect and magnified
(c) Inverted and diminished
(d) Inverted and magnified
The light rays that converge at a point after passing through a convex lens are called:
(a) Divergent rays
(b) Parallel rays
(c) Convergent rays
(d) None of the above
What is the focal length of a plane mirror?
(a) Infinite
(b) Zero
(c) 1 meter
(d) Not defined
The light rays that pass through the center of the lens in a convex lens:
(a) Refract
(b) Do not refract
(c) Diverge
(d) Converge
The image formed by a plane mirror is:
(a) Real, inverted
(b) Virtual, erect
(c) Real, erect
(d) Virtual, inverted
The image formed by a concave mirror when the object is between F and the mirror is:
(a) Virtual, erect, and magnified
(b) Real, inverted, and diminished
(c) Virtual, inverted, and diminished
(d) Real, erect, and magnified
The refractive index of water is approximately:
(a) 1.33
(b) 1.5
(c) 2
(d) 1
When white light passes through a prism, which color bends the least?
(a) Violet
(b) Red
(c) Green
(d) Blue
The phenomenon of twinkling of stars is due to:
(a) Refraction of light
(b) Reflection of light
(c) Dispersion of light
(d) Diffraction of light
The focal length of a concave lens is:
(a) Positive
(b) Negative
(c) Zero
(d) Undefined
The power of a lens is measured in:
(a) Diopters
(b) Meters
(c) Centimeters
(d) Joules
The refractive index of a medium is the ratio of the speed of light in:
(a) Air to the speed of light in the medium
(b) Vacuum to the speed of light in the medium
(c) Water to the speed of light in the medium
(d) Air to the speed of light in water
A convex lens always forms a:
(a) Real, inverted image
(b) Virtual, erect image
(c) Real, erect image
(d) Virtual, inverted image
Which lens is used in the eyepiece of a microscope?
(a) Concave lens
(b) Convex lens
(c) Cylindrical lens
(d) None of the above
What is the image formed by a convex mirror when the object is placed at any distance from the mirror?
(a) Virtual and diminished
(b) Real and diminished
(c) Real and magnified
(d) Virtual and magnified
The speed of light is greatest in:
(a) Water
(b) Air
(c) Vacuum
(d) Glass
Which of the following is a defect of vision corrected by a convex lens?
(a) Myopia
(b) Hypermetropia
(c) Astigmatism
(d) Presbyopia
The focal length of a concave mirror is:
(a) Positive
(b) Negative
(c) Zero
(d) Undefined
A virtual, erect, and diminished image is formed by which of the following mirrors?
(a) Concave mirror
(b) Convex mirror
(c) Plane mirror
(d) Both b and c
The total internal reflection occurs when light passes from:
(a) Water to air
(b) Air to water
(c) Glass to air
(d) Both a and c
The distance from the mirror to the focus is known as the:
(a) Focal length
(b) Object distance
(c) Image distance
(d) None of the above
Which of the following is used in a rear-view mirror of a car?
(a) Concave mirror
(b) Convex mirror
(c) Plane mirror
(d) None of the above
The magnification produced by a convex lens when the object is between F and 2F is:
(a) Virtual and magnified
(b) Real and diminished
(c) Real and magnified
(d) Virtual and diminished
A light ray passes from air into water. What will happen to the speed and direction of the ray?
(a) Speed decreases, bends towards the normal
(b) Speed increases, bends away from the normal
(c) Speed remains the same, bends towards the normal
(d) Speed decreases, bends away from the normal
A person with myopia has difficulty seeing objects:
(a) Close to the eye
(b) Distant from the eye
(c) Both close and distant
(d) None of the above
In a magnifying glass, the image formed is:
(a) Real, diminished
(b) Real, magnified
(c) Virtual, magnified
(d) Virtual, diminished
The critical angle is the angle of incidence at which:
(a) Light reflects
(b) Total internal reflection occurs
(c) Refraction occurs
(d) Dispersion occurs
What is the main function of the eye lens?
(a) To focus light on the retina
(b) To magnify objects
(c) To refract light
(d) To collect light
What type of image is formed by a concave lens when an object is at infinity?
(a) Real and inverted
(b) Virtual and diminished
(c) Virtual and magnified
(d) Real and magnified
The light from the Sun is white, but the rainbow shows many colors. This is due to:
(a) Reflection of light
(b) Dispersion of light
(c) Absorption of light
(d) Scattering of light
Which of the following statements is correct regarding the image formed by a plane mirror?
(a) The image is always virtual
(b) The image is real and inverted
(c) The image is virtual and upright
(d) The image is real and upright
The refractive index of a medium depends on:
(a) The speed of light in the medium
(b) The color of light
(c) The wavelength of light
(d) All of the above
The image formed by a concave mirror when the object is placed at F is:
(a) Real, inverted, and of the same size
(b) Virtual, erect, and magnified
(c) Real, upright, and diminished
(d) Virtual, inverted, and diminished
When light travels from a denser medium to a rarer medium, it:
(a) Bends towards the normal
(b) Bends away from the normal
(c) Travels in a straight line
(d) Reflects
In total internal reflection, the angle of incidence is:
(a) Greater than the critical angle
(b) Equal to the critical angle
(c) Less than the critical angle
(d) Zero
The image formed by a convex mirror is:
(a) Virtual, magnified, and inverted
(b) Real, diminished, and upright
(c) Virtual, diminished, and upright
(d) Real, magnified, and upright
Which of the following does not cause dispersion?
(a) Glass prism
(b) Water droplet
(c) Plane mirror
(d) Convex lens
The focal length of a convex lens is 0.5 m. What is its power?
(a) +2 D
(b) -2 D
(c) +0.5 D
(d) -0.5 D
Which of the following is true about refraction?
(a) The angle of refraction is always less than the angle of incidence
(b) The angle of refraction is equal to the angle of incidence
(c) Refraction occurs when light passes from a less dense to a more dense medium
(d) Refraction only occurs when light passes from air to water
What is the effect of the refractive index on the speed of light in a medium?
(a) Higher refractive index means lower speed of light
(b) Higher refractive index means higher speed of light
(c) Refractive index does not affect the speed of light
(d) Refractive index and speed of light are unrelated
The focal length of a concave lens is:
(a) Positive
(b) Negative
(c) Zero
(d) Undefined
A concave mirror can form:
(a) Only real images
(b) Only virtual images
(c) Both real and virtual images
(d) None of the above
Which of the following is an example of a real image formed by a convex lens?
(a) Image of a distant star
(b) Image formed by a magnifying glass
(c) Image formed on a screen by a movie projector
(d) Image formed by a concave mirror
The refractive index of air is approximately:
(a) 1
(b) 1.5
(c) 2
(d) 0.5
The angle of incidence is 45°, and the angle of refraction is 30°. What is the refractive index of the medium?
(a) 1.3
(b) 0.5
(c) 1.5
(d) 2
The image formed by a concave mirror when the object is placed between F and the mirror is:
(a) Virtual, upright, and magnified
(b) Real, inverted, and diminished
(c) Real, inverted, and magnified
(d) Virtual, inverted, and diminished
The image formed by a plane mirror is always:
(a) Virtual and inverted
(b) Real and magnified
(c) Virtual and magnified
(d) Virtual and erect
In a convex lens, the image formed when the object is placed between F and 2F is:
(a) Real, inverted, and magnified
(b) Real, inverted, and diminished
(c) Virtual, erect, and magnified
(d) Real, erect, and magnified
The light ray that passes through the focal point of a concave lens is:
(a) Reflected
(b) Parallel to the principal axis
(c) Divergent
(d) Convergent
The principle of reversibility of light says:
(a) Light travels in a straight line
(b) The incident and reflected rays are reversible
(c) The refractive index is constant
(d) All of the above
The image formed by a convex lens when the object is at infinity is:
(a) Real, inverted, and diminished
(b) Real, inverted, and magnified
(c) Virtual, upright, and diminished
(d) Virtual, upright, and magnified
When light passes from air to water, its:
(a) Speed increases
(b) Speed decreases
(c) Wavelength increases
(d) Frequency increases
The color of light is determined by:
(a) The refractive index of the medium
(b) The wavelength of the light
(c) The speed of the light
(d) The temperature of the source
The critical angle of a medium is defined as the angle of incidence at which the angle of refraction is:
(a) 0°
(b) 90°
(c) 45°
(d) 180°
A person with presbyopia requires:
(a) Convex lens
(b) Concave lens
(c) Cylindrical lens
(d) No lens
Which of the following is used for the correction of astigmatism?
(a) Convex lens
(b) Concave lens
(c) Cylindrical lens
(d) Both concave and convex lens
The image formed by a convex mirror is:
(a) Always virtual and diminished
(b) Always real and diminished
(c) Always real and magnified
(d) Always virtual and magnified
The refractive index of glass is approximately:
(a) 1.33
(b) 1.5
(c) 2.0
(d) 1.0
The image formed by a concave mirror when the object is at 2F is:
(a) Real, inverted, and the same size as the object
(b) Virtual, erect, and magnified
(c) Real, upright, and diminished
(d) Real, inverted, and magnified
The focal length of a concave mirror is 20 cm. What is the power of this mirror?
(a) +5 D
(b) -5 D
(c) +20 D
(d) -20 D
The speed of light in a vacuum is approximately:
(a) 3 × 10^8 m/s
(b) 3 × 10^5 m/s
(c) 3 × 10^6 m/s
(d) 3 × 10^7 m/s
The dispersion of light is best observed in:
(a) A plane mirror
(b) A concave mirror
(c) A convex lens
(d) A prism
The image formed by a concave lens is always:
(a) Virtual, erect, and diminished
(b) Real, inverted, and magnified
(c) Real, inverted, and diminished
(d) Virtual, inverted, and magnified
The frequency of a light wave is directly proportional to its:
(a) Wavelength
(b) Speed
(c) Energy
(d) Amplitude
A concave lens is thicker at the:
(a) Center
(b) Edges
(c) Both sides equally
(d) None of the above
The angle of refraction for a light ray passing from water (n = 1.33) to air (n = 1.0) is:
(a) Greater than the angle of incidence
(b) Less than the angle of incidence
(c) Equal to the angle of incidence
(d) Not related to the angle of incidence
The image formed by a convex lens when the object is at 2F is:
(a) Real, inverted, and the same size
(b) Virtual, upright, and magnified
(c) Real, upright, and diminished
(d) Virtual, inverted, and diminished
The magnification produced by a concave mirror when the object is placed between F and the mirror is:
(a) Virtual, magnified
(b) Real, diminished
(c) Real, magnified
(d) Virtual, diminished
The refractive index of a medium is:
(a) The ratio of the speed of light in vacuum to the speed of light in the medium
(b) The ratio of the speed of light in the medium to the speed of light in vacuum
(c) Equal to 1
(d) The inverse of the speed of light in the medium
The power of a lens is measured in:
(a) Diopters
(b) Meters
(c) Centimeters
(d) Watt
The image formed by a convex lens when the object is beyond 2F is:
(a) Real, inverted, and diminished
(b) Virtual, erect, and magnified
(c) Real, inverted, and magnified
(d) Virtual, inverted, and diminished
Which of the following is responsible for the formation of a rainbow?
(a) Refraction only
(b) Reflection only
(c) Dispersion of light
(d) Scattering of light
The total internal reflection of light occurs when:
(a) The angle of incidence is greater than the critical angle
(b) The angle of refraction is greater than the critical angle
(c) The angle of incidence is less than the critical angle
(d) The angle of reflection is greater than the critical angle
What happens when light passes through a convex lens?
(a) It diverges
(b) It converges
(c) It changes color
(d) It is absorbed
The image formed by a concave lens is:
(a) Always real
(b) Always virtual
(c) Both real and virtual
(d) Sometimes real, sometimes virtual
Which of the following statements is true for a ray of light passing through a convex lens?
(a) It bends towards the principal axis after passing through the focal point
(b) It bends away from the principal axis after passing through the focal point
(c) It passes straight through the lens
(d) It does not pass through the lens
A convex mirror always forms an image that is:
(a) Real, inverted, and diminished
(b) Virtual, erect, and diminished
(c) Real, magnified
(d) Virtual, magnified
The critical angle is:
(a) The angle beyond which total internal reflection occurs
(b) The angle of incidence for which the angle of refraction is 90°
(c) The angle at which refraction ceases
(d) All of the above
The focal length of a convex lens is 0.5 m. The power of the lens is:
(a) 2 D
(b) 0.5 D
(c) -2 D
(d) -0.5 D
The image formed by a convex mirror is:
(a) Always virtual
(b) Always real
(c) Both real and virtual
(d) Sometimes real, sometimes virtual
The angle of incidence is 60°, and the refractive index of a medium is 1.5. What is the angle of refraction?
(a) 30°
(b) 45°
(c) 40°
(d) 60°
The refractive index of a medium can be determined by:
(a) The angle of incidence
(b) The angle of refraction
(c) Both angle of incidence and angle of refraction
(d) The speed of light in the medium
Solutions:
(a) 40°
(c) Shiny surface
(c) Refraction
(c) Dispersion
(b) Virtual, erect image
(d) Both a and b
(d) All of the above
(a) 1
(b) Convex lens
(a) Focal length
(c) Diffraction
(b) Beyond 2F of a convex lens
(b) It decreases
(b) Always virtual
(a) Positive
(a) Real, inverted, and of the same size as the object
(a) Light passes through a prism
(b) Convex lens
(c) Inverted and diminished
(c) Convergent rays
(a) Infinite
(b) Do not refract
(b) Virtual, erect
(a) Virtual, erect, and magnified
(a) 1.33
(b) Red
(a) Refraction of light
(b) Negative
(a) Diopters
(b) Vacuum to the speed of light in the medium
(a) Real, inverted image
(b) Convex lens
(a) Virtual and diminished
(c) Vacuum
(b) Hypermetropia
(b) Negative
(d) Both b and c
(d) Both a and c
(a) Focal length
(b) Convex mirror
(c) Real and magnified
(a) Speed decreases, bends towards the normal
(b) Distant from the eye
(c) Virtual, magnified
(b) Total internal reflection occurs
(a) To focus light on the retina
(b) Virtual and diminished
(b) Dispersion of light
(c) The image is virtual and upright
(d) All of the above
(a) Real, inverted, and of the same size
(b) Bends away from the normal
(a) Greater than the critical angle
(c) Virtual, diminished, and upright
(c) Plane mirror
(a) +2 D
(c) Refraction occurs when light passes from a less dense to a more dense medium
(a) Higher refractive index means lower speed of light
(b) Negative
(c) Both real and virtual images
(c) Image formed on a screen by a movie projector
(a) 1
(a) 1.3
(a) Virtual, upright, and magnified
(d) Virtual and erect
(a) Real, inverted, and magnified
(b) Parallel to the principal axis
(b) The incident and reflected rays are reversible
(a) Real, inverted, and diminished
(b) Speed decreases
(b) The wavelength of the light
(b) 90°
(a) Convex lens
(c) Cylindrical lens
(c) Always virtual and diminished
(b) 1.5
(a) Real, inverted, and the same size as the object
(b) -5 D
(a) 3 × 10^8 m/s
(d) A prism
(a) Virtual, erect, and diminished
(c) Energy
(b) Edges
(b) Less than the angle of incidence
(a) Real, inverted, and the same size
(a) Virtual, magnified
(b) The ratio of the speed of light in the medium to the speed of light in vacuum
(a) Diopters
(a) Real, inverted, and diminished
(c) Dispersion of light
(a) The angle of incidence is greater than the critical angle
(b) It converges
(b) Always virtual
(a) It bends towards the principal axis after passing through the focal point
(b) Virtual, erect, and diminished
(d) All of the above
(a) 2 D
(a) Always virtual
(b) 45°
(c) Both angle of incidence and angle of refraction