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A black body at 227^(@)C radiates heat a...

A black body at `227^(@)C` radiates heat at the rate of `7" cal/cm"^(2)s`. At a temperature of `727^(@)C`, the rate of heat radiated in the same units will be :

A

50

B

112

C

80

D

60

Text Solution

Verified by Experts

The correct Answer is:
B
`E=sigmaT^(4)`,
`(E_(2))/(E_(1))=((T_(2))/(T_(1)))^(4)=((1000)/(500))^(4)=16`
Given `T_(1)=500" K "T_(2)=1000K`
`:." "E_(2)=16xx7=112" cal/cm"^(2)s`
Correct choice is (a).
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