Refraction of Light at Plane and Spherical Surfaces NEET Questions

Physics - Optics

Refraction of Light at Plane and Spherical Surfaces MCQ Questions


7.
Which quantity remains unchanged during refraction?
A.
Velocity
B.
Frequency
C.
Amplitude
D.
Wavelength
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ANSWER :
B. Frequency
8.
The unit of refractive index is:
A.
Meter
B.
No unit
C.
Joule
D.
Hertz
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ANSWER :
B. No unit
9.
If the refractive index of water is 1.33, what is the speed of light in water? (Speed of light in vacuum = 3 × 10^8 m/s)
A.
2.25 × 10^8 m/s
B.
1.5 × 10^8 m/s
C.
3 × 10^8 m/s
D.
4 × 10^8 m/s
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ANSWER :
B. 1.5 × 10^8 m/s
10.
As light enters from one medium to another, which of the following does NOT change?

NEET - 2017

A.
Speed
B.
Wavelength
C.
Frequency
D.
Direction
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ANSWER :
C. Frequency
11.
Total internal reflection occurs when light travels from:
A.
Denser to rarer medium
B.
Rarer to denser medium
C.
Denser to denser medium
D.
Rarer to rarer medium
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ANSWER :
A. Denser to rarer medium
12.
The critical angle for total internal reflection depends on:
A.
Wavelength of light
B.
Angle of incidence
C.
Refractive index of the medium
D.
Temperature of the medium
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ANSWER :
C. Refractive index of the medium