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How do we get heat from the sun through the freezing cold empty space between the...

How do we get heat from the sun through the freezing cold empty space between the sun and Earth? (Explain.)

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Answer #1

Heat from the sun is obtained not by convection or conduction both of which require a medium to travel, but rather by the radiation process. Sun emits electromagnetic radiation of different wavelengths. These contains infrared wavelength of electromagnetic spectrum, which are responsible for heating. And these electromagnetic radiation do not require any medium to travel. These electromagnetic radiation can travel through empty space also. That's how we got heat from sun.

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