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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^(-1)`. At a temperature of `727^(@)C`, the rate of heat radiated in the same unit will be

A

60

B

50

C

112

D

80

Text Solution

Verified by Experts

The correct Answer is:
C
(3) `(u_(2))/(u_(1)) = ((T_(2))/(T_(1)))^(4)`
`(u_(2))/(7) = ((727 + 273)/(227 + 273))^(4) = ((1000)/(500))^(4) = 16`
`u_(2) = 112 cal//cm^(2) s`
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