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In a single slit diffraction of light of wavelength l by a slit of width e, the size of the central maximum on a screen at a distance b is
detailed solution
Correct option is C
The direction in which the first minima occurs is θ (say). Then esinθ=λ or eθ=λ or, θ=λe (∵ θ=sinθ when θ small) Width of the central maximum =2bθ+e=2b.λe+eTalk to our academic expert!
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In a single slit diffraction experiment first minimum for red light (660 nm) coincides with first maximum of some other wavelength '. The value of ' is
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