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Specific Heat Capacity

The temperatu...

Question

The temperature at which a black body ceases to radiate energy is

0 K

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273 K

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- 273 K

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At all temperatures

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Solution

The correct option is D $0 K$
The rate at which energy is emitted by a blackbody is proportional to the fourth power of absolute temperature (stefan's law)
$\frac{d Q}{d t} \propto T^{4}$
At $0 K$ , no heat is emitted.

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