1.

A perfect black body emits radiation at temperature T_(1)""^(@)K. If it is to radiate 16 times this power, its temperature T_(2) will be :

Answer»

`T_(2)=16T_(1)`
`T_(2)=8T_(1)`
`T_(2)=4T_(1)`
`T_(2)=2T_(1)`.

Solution :`(E_(2))/(E_(1))=((T_(2))/(T_(1)))^(4)""RARR(16E)/(E)=((T_(2))/(T_(1)))^(4)`
`rArrT_(2)=2T_(1)`.
Thus CORRECT choice is (d).


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