Question

which scenario is an example of the transfer of thermal energy by radiation?
a. leftovers are warmed in a microwave oven.
b. a persons body temperature falls as the person swims in the ocean.
c. a piece of chocolate melts in a persons hand.
d. warm air near a heater spreads out to the rest of the room.

Explanation:

Thermal - energy transfer by radiation involves the transfer of energy in the form of electromagnetic waves. In a microwave oven, microwaves (a form of electromagnetic radiation) are used to heat the leftovers. Option B is an example of heat transfer by conduction (person - water contact). Option C is also conduction (hand - chocolate contact). Option D is convection (movement of warm air).

Answer:

A. Leftovers are warmed in a microwave oven.