In which of the following examples is heat transferred primarily by radiation?
A)A fan blows warm air around a room.
B)A hot water bottle warms a person's feet.
C)Water vapor from a shower warms the room.
D)A spoon held near the side of a flame gets warm.

Question

Quizplus · Accepted Answer

Radiation is the transfer of heat through electromagnetic waves, which does not require a medium to travel through. In option D, the spoon gets warm due to the infrared radiation emitted by the flame, even though it is not directly in contact with it.

In Which of the Following Examples Is Heat Transferred Primarily