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Two metal spheres have radii rand 2r and...

Two metal spheres have radii rand 2r and they emit thermal radiation with maximum intensities at wavelengths `lambda` and `2lambda`. respectively. The respective ratio of the radiant energy emitted by them per second will be

A

`4:1`

B

`1:4`

C

`16:1`

D

`8:1`

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