Q. 73.9( 25 Votes )

Light enters from

Answer :

We know that:

Refractive index of glass = (Speed of light in air (or vacuum))/(Speed of light in glass)

1.50 = (3×108)/(Speed of light in glass)

Or, Speed of light in glass = = 2×108 ms-1

Thus, the speed of light in glass is 2×108 ms-1 (or 2×108 m/s).

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