Question

Define critical angle and write its conditions

Answer 1

critical angle is the angle in which the incident ray is 90degrees to that of the refracted ray
conditions
1) more wavelength
2) more temperature

Answer 2

answer here

critical angle. n. 1. The smallest angle of incidence at which a light ray passing from one medium to another less refractive medium can be totally reflected from the boundary between the two. 2.

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