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Dark colours do not exactly absorb more heat, but they do convert a higher percentage of light into heat. If you notice when heading out in the sun with a dark coloured shirt it gets hot, where a lighter coloured shirt would not get nearly as hot. This is due to the amount of light being absorbed by the colour. The lighter the colour the smaller the range of visible light being absorbed and converted into heat.

White objects reflect all visible light, where black objects absorb all visible light. This is also why we call both dark coloured objects and poorly lit objects dark.

While colour is a factor of light absorption, it is not the only factor. You will find that some dark objects remain cooler in direct sunlight then other lighter objects. This is due to the fact that there are other factors at play, maybe one material is a poorer insulator; possibly there is a shine to darker object, leading more light to be reflected as a result. But if all but the colour is the same, you will find that darker colours do become hotter when exposed to light.

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โˆ™ 2009-12-11 19:29:04
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Q: Why does a dark colour absorb more heat than white?
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