# Answer to Question #50645 in Molecular Physics | Thermodynamics for sargam

Question #50645

i) Write an expression for Planck’s law for energy density of photons in a cavity and

calculate total energy density, u. ii) Consider sun as a black body whose interior consists

of photons gas at T=3x 10^6 K Calculate the energy density of the solar radiations.

Take σ=7.56x 10^-16 Jm^-3 k^-4

calculate total energy density, u. ii) Consider sun as a black body whose interior consists

of photons gas at T=3x 10^6 K Calculate the energy density of the solar radiations.

Take σ=7.56x 10^-16 Jm^-3 k^-4

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