1.In first case
n1>n2
The light bends towards normal
2.In second case
n1=n2
Then Ligh going straight
3.In third case
n2>n1
Light bends away normal
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Answers & Comments
1.In first case
n1>n2
The light bends towards normal
2.In second case
n1=n2
Then Ligh going straight
3.In third case
n2>n1
Light bends away normal