Question

How long does it take heat to reach the earth from the sun?

Answer 1

about 8 minutes

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Answer 2

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8 minutes or 20 seconds

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We all know that for motion of heat there is a medium needed but in space there is nothing it is empty so,essentially 100% of the heat from the Sun that the Earth receives is due to the light. Any portion that is not due to electromagnetic radiation is immeasurably low. So we basically receive the Sun's energy at the speed of light.