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Why are the hottest stars blue?

Updated: 4/28/2022
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Wiki User

8y ago

Best Answer

The hotter an object is the shorter the wavelength of light it emits as a shorter wavelength means more concentrated energy. Blue light has a shorter wavelength than most other colors, so the hottest stars are blue.

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Wiki User

8y ago
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Wiki User

14y ago

It's kind of the other way around: they're blue because they're hotter, not hotter because they're blue.

Blue light is more energetic than red light, so it requires a higher temperature to produce.

If you'd like to know more details of exactly how this works, look up the term "black body radiation" or "cavity radiation".

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Q: Why are the hottest stars blue?
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