Question

the speed of light in air and glass is 3 into 10 raise to power 8 metre per second and 2 into 10 to the power 8 metre per second respectively a beam of light falls on a glass at an angle of 30 degree with the surface the angle of refraction in glass is​

Answer 1

Let the refractive index of glass be 'n'.

Speed of light in air = 3*10^8

Speed of light in glass = 2*10^8

The refractive index = Speed of light in air/speed of light in any medium (glass)

n = c/v

n = 3*10^8/2*10^8

n = 3/2. ..... Answer

Therefore the refractive index of glass is 3/2.

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