Question

Physics Challenge , question number 33

Answer 1

The answer should be B)1/sini

Using Snell's law,

ngSin( i ) = nw Sin( r )

and

nwSin ( r ) = na Sin90° [Sin90°=1]

Now,ngSin ( i )= naSin90°

ng=1/Sin ( i )

Answer 2

Explanation:

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