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Two identical light waves, propagating in the same direction, have a phase difference d. After they superpose the intensity of the resulting wave will be proportional to (A) cos d (B) cos (d/2) (C) cos2 (d/2) (D) cos2 d

Two identical light waves, propagating in the same direction, have a phase difference d. After they superpose the intensity of
the resulting wave will be proportional to
(A) cos d (B) cos (d/2) (C) cos2
(d/2) (D) cos2
d

Grade:

2 Answers

Saurabh Koranglekar
askIITians Faculty 10341 Points
one year ago
Dear student

The answer is option c

Regards
Vikas TU
14149 Points
one year ago
I'=I1+I2+2√(I1*I2)*cos x
Given, I1=I2
So, I'=I+I+2Icos x
I'=2I(1+cos x)
=2I*2(cos (x/2))^2
…..............

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