Sir $C$.$V$. Raman was awarded the Nobel Prize in Physics for his work on:

Why is the Moon seen reddish at the time of its rise and set?

The colour of the sky is blue due to

According to Rayleigh, when sunlight travels through the atmosphere, the amount of scattering is proportional to the $n^{\text{th}}$ power of the wavelength of light. Then the value of '$n$' is:

An astronaut in a spaceship sees the outer space as

Which of the following processes play a part in the formation of a rainbow?
$(i)$ Refraction
$(ii)$ Total internal reflection
$(iii)$ Dispersion
$(iv)$ Interference