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Fig. shows a surface XY separating two t...

Fig. shows a surface XY separating two transparent media, medium 1 and medium 2. Lines ab and cd represent wavefronts of a light wave travelling in medium 1 and incident on XY. Line ef and gh represent wavefront of the light wave in medium 2 after rafraciton.

The phase of the ligth wave at c, d, e, and f are `phi_(c)`, phi_(d), `phi_(e)` and `phi_(f)`, respectively. It is given that `phi_(c ) != phi_(f)`. Then

A

`phi_(c)` cannot be equal to `phi_(d)`

B

`phi_(d)` can be equal to `phi_(e)`

C

`(phi_(d)-phi_(f))` is equal to `(phi_(c)-phi_(e))`

D

`(phi_(d)-phi_(c))` is not equal to `(phi_(f)-phI_(e))`

Text Solution

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The correct Answer is:
C
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