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Let I(1) and I(2) be the intensity of tw...

Let `I_(1) and I_(2)` be the intensity of two light waves of amplitudes `a_(1) and a_(2)` respectively . The resultant ampltiudes I at a point due to the superposition of two light waves is

A

`I=I_(1)^(2)+I_(2)^(1)`

B

`I=((I_(1)+I_(2)))/((I_(1)-I_(2)))`

C

`I=I_(1)I^(2)+I_(2)^(2)+2sqrt(I_(1) I_(2) cos (alpha_(1)-alpha_(2)))`

D

`I=I_(2)+I_(2)+sqrt(I_(1)I_(2)) 2 cos (a_(1)-a_(2))`

Text Solution

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The correct Answer is:
D
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