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Question
Pick out the wrong statement:
Options:
A .  With change in temperature, the radiant energy emitted by a black body remains unchanged
B .  Absorptivity of a body approaches unity in case of diffuse reflection
C .  Absorptivity of a perfectly black body is unity
D .  Value of Stefan-Boltzman constant is 4.876 x 10⁻⁸ KCal/m².hr.°K⁴
Answer: Option A
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