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Two identical light waves having phase...

Two identical light waves having phase difference `'phi'` propagate in same direction. When they superpose, the intensity of resultant wave is proportional to

A

`cos^(2)""phi`

B

`cos^(2)"" (phi)/(2)`

C

`cos^(2)""(phi)/(3)`

D

`cos^(2) ""(phi)/(4)`

Text Solution

Verified by Experts

The correct Answer is:
B
For two identical light waves,
`I_R=4I cos^(2) (phi)/(2)`
`therefore I_R alpha cos^(2) (phi)/(2)`
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