If two sources of intensifies $I_0$ each have a randomly varying phase difference ф, the resultant intensity at centre of screen will be :
- $I_0$/2
- 2/$I_0$
- 2$I_0$
- $I_0$/√2
The Correct Option is C
Solution and Explanation
The correct answer is (C): 2$I_0$
As we know 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 is 2$I_0$.
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