Question

if the speed of light in glass is 2 into 10 to the power 8 metre per second then that in air is 3 into 10 to the power 8 metre per second calculate the refractive index of Glass with respect to air​

Answer 1

Explanation:

Refractive index is equal to speed of light in that medium upon speed of light in air. Thanku

Answer 2

The refractive index of Glass with respect to air​ is 1.5

Explanation:

It is given that,

Speed of light in glass, $v_g=2\times 10^8\ m/s$

Speed of light in air, $v_a=3\times 10^8\ m/s$

If n is the refractive index of glass with respect to air​. It is defined as the ratio of speed of light in vacuum to the speed of light in the medium. We need to find the refractive index of Glass with respect to air​. It is given by :

$n=\dfrac{c}{v}$

$n=\dfrac{v_a}{v_g}$

$n=\dfrac{3\times 10^8}{2\times 10^8}$

n = 1.5

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Refractive index

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