Refraction of Light at Plane and Spherical Surfaces NEET Questions

Physics - Optics

Refraction of Light at Plane and Spherical Surfaces MCQ Questions


1.
What is the cause of refraction of light?
A.
Reflection of light
B.
Interference of light
C.
Diffraction of light
D.
Change in speed of light
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ANSWER :
D. Change in speed of light
2.
The refractive index of a medium is defined as the ratio of:
A.
Wavelength of light in air to that in the medium
B.
Speed of light in the medium to that in air
C.
Frequency of light in air to that in the medium
D.
Speed of light in vacuum to that in the medium
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ANSWER :
D. Speed of light in vacuum to that in the medium
3.
Which law governs the refraction of light?
A.
Newton’s Law
B.
Faraday’s Law
C.
Kepler’s Law
D.
Snell’s Law
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ANSWER :
D. Snell’s Law
4.
When light travels from a rarer to a denser medium, it:
A.
Bends away from the normal
B.
Gets reflected back
C.
Passes without deviation
D.
Bends towards the normal
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ANSWER :
D. Bends towards the normal
5.
What happens to the speed of light when it enters a denser medium?
A.
Remains the same
B.
Decreases
C.
Increases
D.
Becomes infinite
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ANSWER :
B. Decreases
6.
When a light ray enters from air into a denser medium, its speed:

NEET - 2016

A.
Increases
B.
Decreases
C.
Remains the same
D.
First increases, then decreases
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ANSWER :
B. Decreases