Total Internal Reflection and its Applications NEET Questions

Physics - Optics

Total Internal Reflection and its Applications MCQ Questions


1.
What is the necessary condition for total internal reflection?
A.
Angle of incidence is greater than critical angle
B.
Angle of refraction is greater than critical angle
C.
Incident light should be from rarer to denser medium
D.
Critical angle is less than 30°
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ANSWER :
A. Angle of incidence is greater than critical angle
2.
The critical angle for total internal reflection depends on:
A.
Density of the medium
B.
Wavelength of light
C.
Refractive index of the medium
D.
Speed of light in the medium
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ANSWER :
C. Refractive index of the medium
3.
Total internal reflection occurs when light travels from:
A.
Denser to rarer medium
B.
Rarer to denser medium
C.
Any medium to any medium
D.
Always from air to glass
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ANSWER :
A. Denser to rarer medium
4.
The phenomenon responsible for mirage formation is:
A.
Dispersion
B.
Total internal reflection
C.
Interference
D.
Refraction
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ANSWER :
B. Total internal reflection
5.
Which optical device works on the principle of total internal reflection?
A.
Optical fiber
B.
Concave lens
C.
Plane mirror
D.
Convex lens
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ANSWER :
A. Optical fiber
6.
What is the critical angle for water (n=1.33) to air transition?
A.
48.75°
B.
50.25°
C.
42.5°
D.
46.5°
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ANSWER :
C. 42.5°