Exercise

Refractive index depends on the _____ of light. (velocity/intensity)

The change in _____ of light rays while going from one medium to another is called refraction.

If the angle of incidence and angle of emergence of a light ray falling on a glass slab are $i$ and $e$ respectively, prove that, $i=e$.

What is the reason for the twinkling of stars?

We can see the sun even when it is little below the horizon because of

If the refractive index of glass with respect to air is $\frac{3}{2}$, what is the refractive index of air with respect to glass?

If the speed of light in a medium is $1.5\times {10}^8 \mathrm{m} {\mathrm{s}}^{-1}$, what is the absolute refractive index of the medium?

If the absolute refractive indices of glass and water are $\frac{3}{2}$ and $\frac{4}{3}$ respectively, what is the refractive index of glass with respect to water?