Two objects A and B have same shape and area. The Emissivity of A is 0.2 and that of B is 0.8. Each radiates same power. The ratio of their absolute temperatures is
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a
2 : 1
b
1 : 4
c
1 : √2
d
√2 : 1
answer is D.
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Detailed Solution
From the surface of a hot body, power radiated is P = eσAT4eA = 0.2, eB = 0.8,