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A Young's double slit experiment uses a ...

A Young's double slit experiment uses a monochromatic light of wavelength `lambda`. The intensity of each slit is same and is equal to `I_(0)`. What will be the resultant intensity at a point where waves interfere at a path difference of `(lambda)/2` ?

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`phi=(2pi)/lambdaxxlambda/2=pi`
Destructive interfere
`I_R=4I_0cos^2 pi/2=0`
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