1.

A black body at high temperature TK radiates energy at the rate "EW/ m"^(2). When the temperature falls to ((T)/(2)) K, the radiated energy will be :

Answer»

`E//4`
`E//8`
`2E`
`E//16`

SOLUTION :`(E_(2))/(E_(1))=((T_(2))/(T_(1)))^(4)""rArr(E_(2))/(E_(1))=((T//2)/(T))^(2)`
`rArrE_(2)=(E)/(16)`
Thus correct CHOICE is (d).


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