Refraction of Light at Plane and Spherical Surfaces NEET Questions

Physics - Optics

Refraction of Light at Plane and Spherical Surfaces MCQ Questions


1.
Snell's law of refraction states that:
A.
The product sin(i) Ɨ sin(r) is constant
B.
The ratio i/r is constant for all angles
C.
The angle of incidence equals the angle of refraction
D.
The ratio sin(i)/sin(r) is a constant equal to the refractive index of the second medium with respect to the first
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ANSWER :
D. The ratio sin(i)/sin(r) is a constant equal to the refractive index of the second medium with respect to the first
2.
When light passes from a rarer to a denser medium, the refracted ray:
A.
Travels along the surface
B.
Bends towards the normal
C.
Bends away from the normal
D.
Does not undergo any deviation
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ANSWER :
B. Bends towards the normal
3.
When light passes from a denser to a rarer medium, the refracted ray:
A.
Is reflected back
B.
Goes along the normal
C.
Bends towards the normal
D.
Bends away from the normal
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ANSWER :
D. Bends away from the normal
4.
The refractive index of a medium with respect to vacuum is given by:
A.
n = v/c
B.
n = c - v
C.
n = c/v, where c is speed of light in vacuum and v is speed in the medium
D.
n = c Ɨ v
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ANSWER :
C. n = c/v, where c is speed of light in vacuum and v is speed in the medium
5.
If the refractive index of glass with respect to air is 3/2, then the refractive index of air with respect to glass is:
A.
2/3
B.
9/4
C.
1
D.
3/2
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ANSWER :
A. 2/3
6.
If nā‚‚ā‚ = 1.5 and nā‚ƒā‚‚ = 1.2, then nā‚ƒā‚ equals:
A.
2.7
B.
0.8
C.
1.8
D.
1.25
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ANSWER :
C. 1.8