The wavelength of light in two liquids ‘x' and ‘y' is 3500 Å and 7000 Å , then the critical angle of x relative to y will be

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60∘

45∘

30∘

15∘

answer is C.

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Detailed Solution

The critical angle C is given bysinC=n2n1=λ1λ2=35007000=12⇒C=30∘

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