A black body at a temperature of `127^(@)C` radiates heat at the rate of 5 cal/`cm^(2)s` at a temperature of `927^(@)C`, its rate of emission in units
A black body at a temperature of `127^(@)C` radiates heat at the rate of 5 cal/`cm^(2)s` at a temperature of `927^(@)C`, its rate of emission in units of cal/`cm^(2)` s will be nearly
A. 405
B. 35
C. 245
D. 350
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Correct Answer - A
`(E_(2))/(E_(1))=((T_(2))/(T_(1)))^(4)=((1200)/(400))^(4)=81`
`E_(2)=81xx5=405`.
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