Question

which process doesn't require a medium for the transfer of heat ​

Answer 1

Radiation doesn't require any medium for transfer of heat. ex- Heat reaches to earth from the sun through radiation process although there is huge vacant space b/w earth and sun.

Answer 2

Hey mate
Here is your answer
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Radiation process doesn't require a medium for the transfer of heat....
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$mark \: it \: brainly$