If two sources have a randomly varying phase difference φ(t) the resultant intensity will be given by
A
I0
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B
I02
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C
2I0
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D
I0√2
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Solution
The correct option is C2I0
Phase difference is ϕ(t),
Since, the phase difference
is varying, then the waves are said to be incoherent. So, the intensity of
resultant wave is the sum of intensities of each wave i.e. 2I0