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Q.

The critical angle for a denser rarer interface is 45°. The speed of light in rarer medium is 3×108m/s. The speed of light in the denser medium is

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a

3.12×107m/s

b

2×108m/s

c

5×107m/s

d

2.12×108m/s

answer is C.

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Detailed Solution

detailed_solution_thumbnail

ic=45∘, Vrarer=3×108 ms 

Vdenser=?

sinic=VdenserVrarer

⇒Vdenser=12×3×108=2.12×108 ms

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