Eli5: Does black clothing eat up thermal heat like light does?

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I’ve heard that black clothing is impractical to wear in a sunny day as light gets eaten up a lot, but if we were to be in, let’s say, a classroom, then we mostly have to worry about our own body heat than if we were outside, thermal energy.

So is black clothing impractical to wear indoors? Or will it be just as hot if you were to wear any other color of clothing?

In: Physics

2 Answers

Anonymous 0 Comments

> So is black clothing impractical to wear indoors?

Black absorbs most light waves from the visible spectrum. But thermal heat is not the same as light. It’s a form of radiation energy (in the infrared spectrum, which is invisible to our eyes).

Black absorbs a similar amount of thermal radiation as other colors. But it has a higher emissity. That means it radiates more heat than other colors.

Indoors, the breathability of your clothing will matter more than its color. Tight-fitting black leather pants will trap heat around your body; a breathable black cotton t-shirt will not.

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