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Question

What is/are the condition(s) to achieve total internal reflection?

A

Light should travel from denser medium to rarer medium
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B
Angle of incidence should be greater than critical angle
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C
Light should travel from rarer medium to denser medium
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D

Both (a) and (b)
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Solution

The correct option is D
Both (a) and (b)

Total internal reflection is the phenomenon of light when light gets completely reflected back into the same medium.
The phenomenon occurs only when
Light travels from a denser medium to a rarer medium
Angle of incidence is greater than the critical angle
Critical angle is the angle of incidence for which the angle of refraction is 90°.

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