Question

mcq based please help...
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Answer 1

Answer:

Explanation:

according to Snell's law

c/n =1N2 = sini/sine

so, c/n = sin60°/sin30°

c/n= √3/2×2/1

c/n = √3

so, n = c/√3

c= 3 × 10to the power 8

thus speed n = √3 × 10^8 m/sec

I hope it helps