If the critical angle for total internal reflection from a medium to a vacuum is $45^\circ$, then the velocity of light in the medium is ______.

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KollegeApply · Accepted Answer

If the critical angle for total internal reflection from a medium to a vacuum is $45^\circ$, then the velocity of light in the medium is `bbunderline(3/sqrt2 xx 10^8 m//s). Explanation: sin C = 1/n sin $45^\circ$ = 1/n 1/sqrt2 = 1/n n = sqrt2` Then, velocity of light in medium v = c/n = 3/sqrt2 xx 10^8 m//s

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