Question: Pick out the wrong statement: With change in temperature, the radiant energy emitted by a black body remains unchanged Absorptivity of a body approaches unity

Pick out the wrong statement:
With change in temperature, the radiant energy emitted by a black body remains unchanged
Absorptivity of a body approaches unity in case of diffuse reflection
Absorptivity of a perfectly black body is unity
Value of Stefan-Boltzmann constant is 4.87610-8 KCal/m2.hr.K4

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