Question

State whether the given statement is true or false.
Heat from the sun reaches us by the process of convection
(A) True
(B) False

Answer 1

Hint: Heat from sun travels through vacuum. The mode of convection requires a material medium. Through vacuum, heat can get transferred only by radiation which does not need a medium of transfer unlike conduction and convection.

Complete step-by-step solution

Heat can move from one point to another by various methods but the heat from the sun reaches earth through radiation. Radiation is a process of transfer of heat from one place to another without heating the intervening medium. As there is no medium existing in space which is necessary for conduction and convection processes to take place, the heat gets transferred by radiation which does not require any medium. Radiation is transfer of heat via electromagnetic waves.

Hence, the statement is false.

Note: Heat energy gets transferred from hot body to a cold body by conduction, convection and radiation.

1. Conduction is where heat travels from one particle to another without dislocating them.
2. Convection is a mode of transfer of heat by means of migration of material particles of medium.