Two spherres made of same material have radii in the ratio 2:1. if both the spheres are at same temperature, then what is the ratio of heat radiation
Two spherres made of same material have radii in the ratio 2:1. if both the spheres are at same temperature, then what is the ratio of heat radiation energy emitted per second by them?
A. `1:4`
B. `4:1`
C. `3:4`
D. `4:3`
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Correct Answer - B
`(E_(1))/(E_(2))=(A_(1))/(A_(2))=(4pir_(1)^(2))/(4pir_(2)^(2))`
`=((r_(1))/(r_(2)))^(2)=(4)/(1)`.
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