Question

what are the modes of heat transfer

Answer 1

radiation is the only mode of heat transfer

Answer 2

In general, there are three methods of heat transfer recognized in Physics.

These are: conduction, convection and radiation.

Conduction is the mode of heat transfer seen between solid and stationary objects.

Convection is the mode of heat transfer seen between fluids.

And radiation is the mode of heat transfer seen in gases.