​​Please answer question number 31.
Q.31. A ray of light enters a diamond from air. If the refractive index of diamond is 2.42, what % (per cent) is speed of light in diamond with that of speed in air?

refractive index=speed of light in airspeed of light in diamond % (per cent) is speed of light in diamond with that of speed in air=1002.42=41.322 percent.Regards

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