The figure shows surface XY separating two transparent media, medium -1 and medium -2. The lines ab and cd represent wavefronts of a light wave travelling in medium -1 and incident on XY. The lines ef and gh represent wavefronts of the light wave in medium -2 after refraction.
(i) Light travels as a
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Ans .
(i)
Sol. Parallel beam in each medium
(ii)
Sol. ( φ d – φ f ) is equal to ( φ c – φ e )
(iii)
Sol. Larger in medium –1 than in medium –2
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