Question

Question 1
The atmosphere of the earth is heated by radiations which are mainly

(a) radiated by the sun
(b) re-radiated by land
(c) re-radiated by water
(d) re-radiated by land and water​​​​​​​

Answer 1

(d) re-radiated by land and water​​​​​​​​​​​​​​

The atmosphere can be heated from below by the radiation that is reflected back or re-radiated by the land or water bodies. On being heated, convection currents are set up in the air.