Q18 of 284 Page 228

Light travels through air at 300 million ms-1. On entering water it slows down to 225 million ms-1. Calculate the refractive index of water.

Speed of light in air = 3 x 108 m/sec

Speed of light in water = 2.25 x 108 m/sec


We know that



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State and explain the laws of refraction of light with the help of a labeled diagram.

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The refractive indices of four substances P, Q, Rand S are 1.50, 1.36, 1.77 and 1.31 respectively. The speed of light is the maximum in the substance:

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