Question

What is the only method of heat transfer that does not require matter?

Answer 1

1.There are basically three mechanisms of heat transfer:

(a). Conduction

(b). Convection

(c). Radiation

2. Out of these three mechanisms, Radiation is the only method of heat transfer in which matter is not required.

3. In this method, heat transfer is directly caused by the radiation emitting from the body.

4. The best example of radiation is the heating up of earth due to the sun.

Thus, the answer is radiation.