In Young's double slit experiment, using monochromatic light of wavelength λ , the intensity of light at a point on the screen where the path difference is λ , is K units. The intensity of light at a point where the

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Correct answer: A. (K)/(4)

Phase difference φ is related to path difference Δ x by φ = (2π)/(λ) Δ x . The intensity I at a point on the screen is given by I = I_ ^2((φ)/(2)) . For Δ x = λ , φ = (2π)/(λ) × λ = 2π . Intensity I = I_ ^2(π) = I_ = K . For Δ x = (λ)/(3) , φ = (2π)/(λ) × (λ)/(3) = (2π)/(3) . Intensity I' = I_ ^2((π)/(3)) = K ((1)/(2))^2 = (K)/(4) . Answer: (K)/(4)

In Young's double slit experiment, using monochromatic light of...

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