MHT CET20228 Aug 2022Morning ShiftPhysicsThermal Properties of MatterActual
At 273^ C , the emissive power of a perfectly black body is R . It emissive power at 0^ Cis
Options
- AR 4
- BR 8
- CR 16
- DR 2
Correct answer
C. R 16
Step-by-step solution
From Stefan's law, the total radiant energy emitted per second per unit surface area of a black body is proportional to the fourth power of the absolute temperature (T) of the body E= T^4 Given, T₁=273^ C =273+273 ~K =564 ~K T₂=0^0 C =273 ~K aligned & E₁ E₂ = T₁^4 T₂^4 & E₂= T₂^4 T₁^4 E₁= (273)^4 (564)^4 R= R 16 aligned