Question

in medium light ray travelling d distance in t time. so, in that time in free space travelling distance ,refractive index mu.
A) mud b) mux/d c) mu d) mud/x
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Answer 1

Answer:

Case 1: When light rays travel from optically rarer medium to denser medium then they bend towards normal. In this case angle of refraction is smaller than angel of incidence. When light rays travel from air into glass or from air into water, it bends towards normal