Total Internal Reflection and its Applications NEET Questions

Physics - Optics

Total Internal Reflection and its Applications MCQ Questions


7.
Which of the following is an application of total internal reflection?
A.
Periscope
B.
Rainbow formation
C.
Optical fiber
D.
Total internal reflection in diamonds
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ANSWER :
C. Optical fiber
8.
Total internal reflection occurs when light travels from:

NEET - 2015

A.
A denser to a rarer medium
B.
A rarer to a denser medium
C.
Any two mediums
D.
Only in air
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ANSWER :
A. A denser to a rarer medium
9.
Optical fibers work on the principle of:
A.
Diffraction
B.
Total internal reflection
C.
Polarization
D.
Interference
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ANSWER :
B. Total internal reflection
10.
Which of the following conditions is necessary for total internal reflection to occur?
A.
Angle of incidence > Critical angle
B.
Light must be traveling from denser to rarer medium
C.
Light must be traveling from rarer to denser medium
D.
Light must be traveling from denser to rarer medium at an angle greater than critical angle
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ANSWER :
A. Angle of incidence > Critical angle
11.
A diamond sparkles because of:
A.
Multiple total internal reflections
B.
High refractive index
C.
Low refractive index
D.
Surface smoothness
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ANSWER :
A. Multiple total internal reflections
12.
The condition for total internal reflection is:

NEET - 2016

A.
Incident angle = Refraction angle
B.
Incident angle > Critical angle
C.
Incident angle < Critical angle
D.
Incident angle = 90°
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ANSWER :
B. Incident angle > Critical angle