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Q.

An incident ray makes a 40o angle with a normal air-glass interface of the rectangular glass slab. The angle of emergence will be


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a

55o

b

60o

c

40o

d

65o 

answer is C.

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Detailed Solution

The angle of emergence will be 40o.
For a rectangular glass slab, the angle of incidence (i) is always equal to the angle of emergence.
                                                    Question ImageHence, the angle of emergence is 40o.
 
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