Question

Which is the fastest mode of heat transfer?

(a) Conduction

(b) Convection

(c) Radiation

(d) Both conduction and convection

The question was posed to me during an online exam.

My question is based upon Heat Radiation in chapter Heat Transfer Theory of Food Processing Unit Operations

Answer 1

Correct answer is (c) Radiation

For explanation I would say: The fastest mode of heat transfer is radiation as it travels at the speed of light. Conduction is the slowest mode of heat transfer because it takes place from particle to particle.