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Two electric lamps A and B radiate the s...

Two electric lamps A and B radiate the same power. Their filaments have the same diemensions, and have emissivities. `e_(A)` and `e_(B)`. Their surface tempratures are `T_(A)` an `T_(B)`. The ratio `T_(A)//T_(B)` will be equal to

A

`((e_(B))/(e_(A)))^(1//4)`

B

`((e_(B))/(e_(A)))^(1//2)`

C

`((e_(A))/(e_(B)))^(1//2)`

D

`((e_(A))/(e_(B)))^(1//4)`

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The correct Answer is:
A
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