Consider radiative heat transfer inside a cylinder with a radius R and length L $(=$ R$).$ The

two flat surfaces of the cylinder are maintained at $1000$K$,$ while the curved surface of the

cylinder is maintained at $300$K$.$ Both flat surfaces have an emissivity of $0\mathrm{.}5,$ while the

curved surface is black. Calculate the net radiative heat flux on the curved surface.

Assume that the medium inside the cylinder is radiatively non$-$participating.

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