A ray incident on the refracting face
is refracted in the prism
as shown in the figure and emerges from the other refracting face
as
such that
. If the angle of prism
and refractive index of the material of prism is
, then the angle of deviation of the ray is:
None of these
For a given prism, the angle of deviation depends upon the angle of incidence of the light rays falling on the prism. Taking triangle , we have
Hence, angle of deviation of the ray is .
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