If the temperature of a body is reduced to half of in initial temperature, then radiation power decresed by

Options

A. 0.84
B. 0.94
C. 0.06
D. 0.16

Answer

B

Explanation

`(P_(2))/(P_(1))=((T_(2))/(T_(1)))^(4)=(((T)/(2))/(T))^(4)`
`(P_(2))/(P_(1))=(1)/(16)`
`(P_(2)-P_(1))/(P_(1))=(1-16)/(16)=-(15)/(16)=93.75%=94%`.