question_answer 23)

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:

(d) When solar radiations fall on earth, some are absorbed by the land but majority of these are reflected back or re-radiated by land and water bodies. These re-radiated or reflected solar radiation, heat up the atmosphere. This results in convection currents.