Question

which of the following best explains why a person standing near a campfire feels warmth on only one side of their body? 1 convection currents in the air 2 thermal expansion of surrounding materials 3 conduction through the ground 4 radiation transferring electromagnetic wave

Explanation:

Heat transfer from a camp - fire to a person is mainly through radiation. Radiation transfers energy in the form of electromagnetic waves and can heat one side of the body facing the fire. Convection currents in the air would affect the overall air temperature around the person rather than just one side. Thermal expansion of surrounding materials is not related to the person feeling warmth on one side. Conduction through the ground would not cause warmth on one side of the body from a camp - fire as the heat transfer is mainly vertical through the ground and not directly to one side of the standing person.

Answer:

Radiation transferring electromagnetic waves