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# Which formula to use in these type of questions. Please give me solution as well as the formula

Arun
25763 Points
3 years ago
Dear Preeti

Use
E = $\sigma$ T4
T is in kelvin
When you put this
You get
E = $\sigma$ (546)4
And
E2 = $\sigma$ (273)4
Hence
E2/E = 1/16
E2 = E/16

Regards