A small surface of area A 1 8 cm 2 emits radiation as a blackbody at T 1 800 K Part of the radiation emitted by A 1 strikes another small surface of area A 2 8 cm 2 oriented as shown in the figure Determine the solid angle subtended by A 2 when viewed from A 1 , and the rate at which radiation emit...

Solid angle subtended by A2 when viewed from A1 The solid angle subtended by a surface at a point is ...

A small surface of area A 1 = 8 cm 2 emits radiation as a blackbody at

Question:

A small surface of area A₁ = 8 cm² emits radiation as a blackbody at T₁ = 800 K. Part of the radiation emitted by A₁strikes another small surface of area A₂ = 8 cm² oriented as shown in the figure. Determine the solid angle subtended by A₂when viewed from A₁, and the rate at which radiation emitted by A₁ strikes A₂ directly. What would your answer be if A₂were directly above A₁ at a distance of 80 cm? 0 = 45 A = 8cm T = 800 K A = 8 cm 0 = 60 r = 80 cm