Question
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 
and pressure.
If the shell now undergoes an adiabatic expansion the relation between T and R is
-
T ∝ e-R
-
T ∝ e-3R
-
T ∝ (1/R)
-
T ∝(1/R3)
Solution
C.
T ∝ (1/R)
According to given equation,
