Why is the angle of emergence equal to angle of incidence in given figure? Prove it mathematically .
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If the angle of incidence and angle of emergence of a light ray falling on a glass slab are given then by applying Snell’s law we can get,
sinr
sini
=
n
1
n
2
sine
sinr
=
n
2
n
1
On multiplying the above two equation we get
sine
sini
=1
sini=sine
Hence the angle of incidence is equal to the angle of emergence
Explanation:
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