At what temperature can visible heat be seen?

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Multiple Choice

At what temperature can visible heat be seen?

Explanation:
Visible heat comes from an object emitting light in the visible spectrum as it gets hotter. At lower temperatures, most of the radiation is in the infrared, which we can’t see. When the temperature climbs to about five hundred degrees Celsius, the glow starts to appear in the visible range, so you can actually see the heat. So, the moment you begin to see a glow is around 500°C. Temperature lower than that won’t show visible glow, and at very high temperatures the glow becomes even brighter, but the threshold where visible light first appears is around 500°C.

Visible heat comes from an object emitting light in the visible spectrum as it gets hotter. At lower temperatures, most of the radiation is in the infrared, which we can’t see. When the temperature climbs to about five hundred degrees Celsius, the glow starts to appear in the visible range, so you can actually see the heat. So, the moment you begin to see a glow is around 500°C. Temperature lower than that won’t show visible glow, and at very high temperatures the glow becomes even brighter, but the threshold where visible light first appears is around 500°C.

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