Question

if a ray passes through glass slab on 90 degree then measures angle of incidence and angle of refraction

also find angle of emergence ​

Answer 1

angle emergence is equal to angle of incidence

e = 90°

Answer 2

if a ray passes through glass slab on 90 degree then angle of incidence, emergence and refraction is equal to 90

it means that there is no refraction occur.

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