A black body radiates 3 J/`cm^(2)` s when its temperature is `127^(@)C`. How much heat will be radiated/`cm^(2)` s when its temperature is `527^(@)C`?

Question

A black body radiates 3 J/`cm^(2)` s when its temperature is `127^(@)C`. How much heat will be radiated/`cm^(2)` s when its temperature is `527^(@)C`?

A black body radiates 3 J/`cm^(2)` s when its temperature is `127^(@)C`. How much heat will be radiated/`cm^(2)` s when its temperature is `527^(@)C`?
A. 6
B. 12
C. 3.84
D. 48

Monjur Alahi

4 views

2025-01-04 04:42

1 Answers

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Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

Salim Ahmed Kawsar

Correct Answer - D
`E_(1)=sigmaT_(1)^(4) and E_(2)=sigmaT_(2)^(4)`
`E_(2)=((T_(2))/(T_(1)))^(4)E_(1)=((800)/(400))^(4)E_(1)=16E_(1)`
`E_(2)=48J//s" "cm^(2)`

4 views Answered 2023-02-05 15:29