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A monochromatic light of wavelength 6000Å is incident on a thin glass plate of refractive index 2, such that the angle of refraction in the plate is 45°, then smallest thickness of the plate which will make it dark by reflection

(a) 3000 Å

(b) 1500 Å

(c) 4000 Å

(d) 4500 Å

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1 Answer

+1 vote
by (31.5k points)

Answer is (a) 3000 Å

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