Question

No medium is required for transfer of heat by the process of __________. Fill in the blank.
Topic: Heat

Answer 1

-$\textbf{radiation}$-

Radiation don't required any medium to travel it can even travel through the vaccum.

Answer 2

No medium is required for transfer of heat by the process of Radiation.

Radiation is a heat transfer method which doesn’t rely upon any contact among the heated object and the heat source, unlike the convection and conduction method.

Through empty space heat can be transmitted by the thermal radiation.