Eli5: If heat is molecular vibration speed, how is seeing in infrared “heat vision”?

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Does the color in infrared always correspond to temperature? Like, more so than it does in the visible spectrum?

In: Physics

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Molecules vibrating causes their electrons to vibrate, which produces electromagnetic radiation. More vibration produces higher frequencies of radiation. Enough vibration, and you see visible light, starting as a red glow. However, at room temperature, this frequency is in the far infrared.

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