Chapter 13, Problem 13.23P

A tubular healer with a black inner surface of uniform temperature $T_s=1000\text{K}$ irradiates a coaxial disk.

(a) Determine the radiant power from the heater which is incident on the disk, $q_{s\to 1}$ . What is the irradiation on the disk, G₁?
(b) For disk diameters of $D_1=25,50$ , and 100 mm, plot $q_{s\to 1}$ and G₁as a function of the separation distance L₁for $0\le L_1\le 200\text{mm}$ .