Two spheres of radii 8 cm and 2 cm are cooling. Their temperatures are 127∘C and 527∘C respectively. Find the ratio of energy radiated by them in same time
A
0.06
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B
0.5
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C
1
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D
∞
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Solution
The correct option is C1 Total energy radiated by body in time t=Q=ϵσAT4t
where A is the surface area of the radiating body.