The colour of the surface of an object has an effect on the rate of infrared radiation that it absorbs and emits. As a result of this, some clothes which are otherwise identical will keep a person warmer when outside in winter because of their differences in colour. Which line in the table shows the correct comparison between black and white surfaces?

Answer:

3) B

Black surfaces are better absorbers and emitters of infrared than white surfaces.

In winter, people need to keep themselves warm. The white, shiny surfaces will reflect infrared back into the person to keep them warm inside their clothes.

Better absorbers – Black

Better emitters – Black

Better colour of clothes in winter – White (good reflectors of radiation)