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In Young's double-slit experiment, the t...

In Young's double-slit experiment, the two slits act as coherent sources of equal amplitude `A` and of wavelength `lamda`. In another experiment with the same set-up the two slits are sources of equal amplitude `A ` and wavelength `lamda`, but are incoherent. The ratio of the intensity of light at the midpoint of the screen in the first case to that in the second case is....

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The correct Answer is:
2
Let intensity of wave is `I` in first experiment there will be constructive interference
So `I_(1)=4I`
in second case intensity`I_(2)=I+I=2I`
So`(I_(1))/(I_(2)) =(2)/(1)`
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