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Two identical light waves, propagating i...

Two identical light waves, propagating in the same direction, have a phase difference `delta`. After they superpose, the intensity of the resulting wave will be proportional to

A

`cos delta`

B

`cos((delta)/2)`

C

`cos^(2)((delta)/2)`

D

`cos^(2)delta`

Text Solution

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The correct Answer is:
C
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Knowledge Check

  • Two identical sinusoidal waves each of amplitude 10 mm with a phase difference of 90^(@) are travelling in the same direction in a string. The amplitude of the resultant wave is

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