Two point monochromatic and coherent sources oflight of wavelength lambdaare each placed as shown in the figure below. The initial phase difference between the sources is zero. Select the incorrect statement.

Two point monochromatic and coherent sources oflight of wavelength lam

1.	Two point monochromatic and coherent sources oflight of wavelength lambdaare each placed as shown in the figure below. The initial phase difference between the sources is zero. Select the incorrect statement.
Answer» If `d=(7lambda)/2`, O will be minima If `d=LAMBDA`, only one maxima can be OBSERVED on screen . If d=4.8`lambda`, then total 10 minimas would be there on screen. If `d=(5lambda)/2` , then intensity at Owould be maximum. Solution :Path difference , `Deltax` at O is d. So, if `d=(7lambda)/2`, O will be a minima. If `d=lambda`, O will be maxima . If `d=(5lambda)/2`, O will be minima and henceintensity is MINIMUM If d=4.8 `lambda` , then total 10 minimas can be observed on screen, 5 above and 5 below O,which correspond to `Deltax=pm lambda/2, pm(3lambda)/2 , pm (5lambda)/2 , pm (7lambda)/2, pm(9lambda)/2`

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Two point monochromatic and coherent sources oflight of wavelength lambdaare each placed as shown in the figure below. The initial phase difference between the sources is zero. Select the incorrect statement.

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