An astronaut in a spaceship sees the outer space as

Why does the Sun have an elliptical shape at the time of sunrise and sunset? It is due to:

Pick the wrong answer in the context of a rainbow.

Discuss the natural phenomena that occur due to sunlight.

If the scattering intensity of a liquid is $8 \text{ units}$ at a wavelength of $500 \text{ nm}$, then the scattering intensity at a wavelength of $400 \text{ nm}$ will be approximately: (in $\text{ units}$)

On which does the scattering of light depend?