If the critical angle for total internal reflection from a medium to vacuum is 30°, the velocity of light in the medium is\[3\times 10^{8} m/s \]\[1.5\times 10^{8} m/s \]\[6\times 10^{8} m/s \]\[\sqrt{3}\times 10^{8} m/s \]No solution provided for this question.
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