Physics
The correct relation between critical angle and refractive index of a medium is:
- cos C =
- tan C =
- sin C =
- sin C =
Refraction Plane Surfaces
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Answer
sin C =
Reason — When an incident ray from glass to air at an angle of incidence i = C (critical angle) for which the angle of refraction r is 90°. Then, the refractive index of air with respect to glass is :
=
As, sin 90° = 1
∴ sin C = or
sin C =
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