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Two identical metal balls, one at T 1 =300 K and the other at T 2 =600 K are kept at a distance of 1 m in vacuum. Will the temperatures equalize by radiation? Will the rate of heat gained by the colder sphere be proportional to T 2^4 -T 1^4 as may be expected from the Stefan’s law?

 Two identical metal balls, one at T1=300 K and the other at T2=600 K are kept
at a distance of 1 m in vacuum. Will the temperatures equalize by radiation? Will
the rate of heat gained by the colder sphere be proportional to T2^4-T1^4 as may be
expected from the Stefan’s law?

 

Grade:

1 Answers

Abhishek Kumar
askIITians Faculty 253 Points
6 years ago
Yes it will. If you neglect convection, time taken to neutralize would be longer.
The above relation is valid for radiation energy transfer. Formula for convection is proportional to temperature difference.

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