MCQ questions for class 10 Science Chapter 10 Light Reflection and Refraction
Question 1: What is the speed of light in a vacuum?
300,000 km/s
150,000 km/s
100,000 km/s
50,000 km/s
Question 2: When light enters from air to glass, it bends towards the _____ normal.
Parallel to
Away from
Perpendicular to
None of the above
Question 3: The angle of incidence is equal to the angle of reflection according to the _____ Law of Reflection.
Fermat's
Newton's
Huygens'
Snell's
Question 4: Which of the following is a convex mirror used in vehicles?
Concave
Plane
Diverging
Convex
Question 5: The distance between the optical centre and the focus of a concave mirror is called the _____ focal length.
Real
Virtual
Positive
Negative
Question 6: The phenomenon responsible for the formation of a rainbow is:
Dispersion
Refraction
Reflection
Total internal reflection
Question 7: The change in speed of light while passing from one medium to another causes _____ of light.
Refraction
Reflection
Dispersion
Polarization
Question 8: What type of lens is used to correct hypermetropia?
Concave
Convex
Bifocal
Cylindrical
Question 9: The twinkling of stars is due to:
Refraction of light
Reflection of light
Dispersion of light
Scattering of light
Question 10: The splitting of white light into its constituent colors is called:
Reflection
Refraction
Dispersion
Scattering
Question 11: Which of the following is the correct unit for power of a lens?
Dioptre
Candela
Lumen
Watt
Question 12: A lens that is thicker in the center than at the edges is a _____ lens.
Convex
Concave
Diverging
Biconcave
Question 13: The angle of minimum deviation for a prism occurs when the emergent ray is _____ to the incident ray.
Perpendicular
Parallel
At an angle of 45 degrees
None of the above
Question 14: The phenomenon of mirage is due to:
Total internal reflection
Refraction of light
Dispersion of light
Scattering of light
Question 15: The apparent bending of a pencil in water is due to:
Refraction of light
Reflection of light
Dispersion of light
Interference of light
Question 16: The ability of the eye to focus on distant as well as near objects by adjusting its focal length is called:
Myopia
Hypermetropia
Astigmatism
Presbyopia
Question 17: The lens used in a camera is usually a _____ lens.
Convex
Concave
Biconvex
Biconcave
Question 18: The power of a lens is measured in:
Candle
Lumen
Dioptre
Watt
Question 19: The colors seen in a soap bubble are due to:
Reflection
Refraction
Dispersion
Interference
Question 20: What is the name given to the bundle of nerve fibers that carry information from the retina to the brain?
Pupil
Iris
Cornea
Optic nerve
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