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Two spheres of the same material have radii 1 m and 4 m and temperatures 4000 K and 2000 K

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Two spheres of the same material have radii 1 m and 4 m and temperatures 4000 K and 2000 K respectively. The ratio of the energy radiated per second by the first sphere to that by the second is : 

(a) 1 : 1 

(b) 16 : 1 

(c) 4 : 1 

(d) 1 : 9

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1 Answer

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by (92.4k points)

Correct option (a) 1 : 1 

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