According to one model of the Sun, the central density is 1.53 × 10^5kgm^-3 and the Rosseland me

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According to one model of the Sun, the central density is $1.53 \times 10^{5} \mathrm{kg} \mathrm{m}^{-3}$ and the Rosseland mean opacity at the center is $0.217 \mathrm{m}^{2} \mathrm{kg}^{-1}$. (a) Calculate the mean free path of a photon at the center of the Sun. (b) Calculate the average time it would take for the photon to escape from the Sun if this mean free path remained constant for the photon's journey to the surface. (Ignore the fact that identifiable photons are constantly destroyed and created through absorption, scattering, and emission.)

          According to one model of the Sun, the central density is $1.53 \times 10^{5} \mathrm{kg} \mathrm{m}^{-3}$ and the Rosseland mean opacity at the center is $0.217 \mathrm{m}^{2} \mathrm{kg}^{-1}$.
(a) Calculate the mean free path of a photon at the center of the Sun.
(b) Calculate the average time it would take for the photon to escape from the Sun if this mean free path remained constant for the photon's journey to the surface. (Ignore the fact that identifiable photons are constantly destroyed and created through absorption, scattering, and emission.)

Added by Eric W.

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