Name the phenomenon due to which the stars seem higher in the sky than they actually are.

Atmospheric refraction causes advance sunrise and delayed sunset. By how much time is:

(a) sunrise advanced?

(b) sunset delayed?

State whether the following statement is true or false:

The planets twinkle at night due to atmospheric refraction of light.

Fill in the following blanks with suitable words:

We can see the sun about.............minutes before the actual sunrise and about.............minutes after the actual sunset because of atmospheric...............

Why do stars seem higher than they actually are? illustrate your answer with the help of a diagram.