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Light mcq Class 10. We covered all the Light mcq Class 10 in this post for free so that you can practice well for the exam.
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mcq on Light for Students
Which part of a traditional camera is functionally similar to the retina of the human eye?
(a) Film
(b) Lens
(c) Shutter
(d) Cover
Option a – Film
What type of mirror is commonly used as a vehicle’s rearview mirror?
(a) Plane
(b) Convex
(c) Concave
(d) Plano-concave
Option b – Convex
A mirage is caused by which optical phenomenon?
(a) Interference of Light
(b) Diffraction of Light
(c) Polarization of Light
(d) Total internal reflection
Option d – Total internal reflection
The colour of visible Light is determined by its
(a) Amplitude
(b) Wavelength
(c) Intensity
(d) Speed
Option b – Wavelength
Which type of electromagnetic waves is utilized in TV remote controls?
(a) Infrared
(b) Ultraviolet
(c) Visible
(d) None of these
Option a – Infrared
The image formed on the retina of the human eye is
(a) Always upright
(b) Always upside down
(c) Depends on Light intensity
(d) Depends on the person’s age
Option b – Always upside down
A concave lens is used to correct which vision defect?
(a) Convex lens
(b) Concave lens
(c) Cylindrical lens
(d) Plano-convex lens
Option b – Concave lens
When Light enters a different medium, which of its properties stays unchanged?
(a) Intensity
(b) Speed
(c) Wavelength
(d) Frequency
Option d – Frequency
Night vision devices do not make use of
(a) Light amplification
(b) Infrared detection
(c) Heat emitted from objects
(d) X-rays from objects
Option d – X-rays from objects
Among the listed radiations, which one has the maximum energy?
(a) Visible light
(b) X-rays
(c) Ultraviolet rays
(d) Infrared rays
Option b – X-rays
Two convex lenses each with a power of 2 dioptres are combined. What is their effective focal length?
(a) 0.10 m
(b) 2 m
(c) 4 m
(d) 0.25 m
Option d – 0.25 m
How can the component colours of white light be separated?
(a) Passing it through a prism
(b) Filtering it
(c) Cannot be separated
(d) Both (a) and (b)
Option a – Passing it through a prism
What is the least height a plane mirror must be to reflect a person’s full body?
(a) Equal to the person’s height
(b) Half of the person’s height
(c) One-fourth of the person’s height
(d) Twice the person’s height
Option b – Half of the person’s height
What is the wavelength range of visible light?
(a) 200–900 nm
(b) 600–780 nm
(c) 300–800 nm
(d) 390–780 nm
Option d – 390–780 nm
When an object moves farther from a plane mirror, what happens?
(a) The image stays the same
(b) The image becomes smaller than the object
(c) The distance between the mirror and image increases
(d) The image gets closer to the mirror
Option c – The distance between the mirror and image increases
Butter paper is an example of what kind of material?
(a) Transparent
(b) Translucent
(c) Opaque
(d) Luminous
Option b – Translucent
The Sun appears earlier than its actual rise due to
(a) Reflection
(b) Refraction
(c) Scattering of light
(d) Straight-line propagation of light
Option b – Refraction
The main cause of colour separation in a rainbow is
(a) Dispersion of sunlight
(b) Reflection of sunlight
(c) Refraction of sunlight
(d) Total internal reflection
Option a – Dispersion of sunlight
A rainbow is created due to which combination of light phenomena?
(a) Refraction, reflection, and dispersion in raindrops
(b) Reflection and dispersion only
(c) Refraction only
(d) Dispersion only
Option a – Refraction, reflection, and dispersion in raindrops
A child sees her reflection in a funhouse mirror. Her head appears larger, body normal, and legs smaller. The mirror combination from top to bottom is
(a) Plane, convex, concave
(b) Convex, concave, plane
(c) Concave, plane, convex
(d) Convex, plane, concave
Option c – Concave, plane, convex
Which of the following is incorrect for someone with hypermetropia?
(a) Distant objects are seen clearly
(b) Eye lens has a longer focal length
(c) Near objects form behind the retina
(d) Corrected using a concave lens
Option d – Corrected using a concave lens
A simple periscope works on which principle of light?
(a) Reflection
(b) Refraction
(c) Dispersion
(d) Total internal reflection
Option d – Total internal reflection
Which statement is true about the refractive index of a material with respect to air?
(a) Can be negative or positive
(b) May be zero
(c) Always equals one
(d) Always greater than one
Option d – Always greater than one
If the refractive index of glass is 3/2 and water is 4/3, what is the ratio of light speed in glass to that in water?
(a) 3 : 4
(b) 4 : 3
(c) 8 : 7
(d) 8 : 9
Option d – 8 : 9
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