A) 6mm
B) 9mm
C) 18mm
D) 12mm
Correct Answer: D
Solution :
[d] The intensity is given by |
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where, ![]() ![]() |
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Now, intensity is ![]() |
![]() |
From Eqs. (i) and (ii), we get |
![]() |
![]() ![]() |
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