The critical angle of a medium with respect to a vacuum is 30 degree . The velocity of ligt in the medium will be a)3x10power8 m/s b)2x10power8m/s c)1.5x10power8m/s d)3.1x10power8m/s pls dont give a direct answer , give a clear explanation
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The critical angle of a medium with respect to a vacuum is 30 degree . The velocity of ligt in the medium will be a)3x10power8 m/s b)2x10power8m/s c)1.5x10power8m/s d)3.1x10power8m/s pls dont give a direct answer , give a clear explanation
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