Question

critical angle of a glass pair is 42 what do you mean by this statement​

Answer 1

When the angle of incidence is greater than the critical angle, the light ray is reflected at the boundary of the two media and total internal reflection occurs. ... For example, the critical angle for light moving from glass to air is 42°, and that of water to air is 48,8°.

Answer 2

Answer:

all light waves which hit the surface beyond this critical angle , are effectively trapped. the critical angle for most glass is about 42 degree

Explanation:

this causes light rays to bend when they passed from glass to air at angle other than 90 degree this is refraction .

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