Consider a spherical shell of radius R at temperature T. The black body radiation inside it can be considered as an ideal gas of photons with internal energy per unit volume `u=U/V propT^4` and pressure `P=1/3(U/V)`. If the shell now undergoes an adiabatic expansion the relation between T and R is :A. `T prop e^(-3R)`B. `T prop 1/R`C. `T prop 1/R^(3)`D. `T prop e^(-R)`

Consider a spherical shell of radius R at temperature T. The black bod

1.	Consider a spherical shell of radius R at temperature T. The black body radiation inside it can be considered as an ideal gas of photons with internal energy per unit volume `u=U/V propT^4` and pressure `P=1/3(U/V)`. If the shell now undergoes an adiabatic expansion the relation between T and R is :A. `T prop e^(-3R)`B. `T prop 1/R`C. `T prop 1/R^(3)`D. `T prop e^(-R)`
Answer» Correct Answer - B

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