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Two black metallic spheres of radius 4m,...

Two black metallic spheres of radius 4m, at 2000 K and 1m at 4000 K will have ratio of energy radiation as

A

`1:1`

B

`4:1`

C

`1:4`

D

`2:1`

Text Solution

Verified by Experts

The correct Answer is:
A
As `Q prop r^2 T^4`
`(Q_1)/(Q_2)=(r_1^2T_1^4)/(r_2^2T_2^4)=(4^2)/(1^2) xx ((2000)/(4000))^4 =1`
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