Question

Which method of heat transfer does not need a medium.

• A. Conduction
• B. Convection
• C. Radiation

Answer 1

The correct option is C

Radiation

1. Radiation is a process in which the transfer of heat takes place in form of electromagnetic waves.
2. Hence, radiation does not require any medium for the transfer of heat.
3. For example, heat from the Sun is transferred to Earth by radiation.

Hence option C is correct.