An emitting surface (A1 = 20^-3 m^2) is diffusely radiating with a total intensity of 1000 W m-2 sr-1 in the normal direction. Radiation from the emitting surface is striking another surface (A2 = 20^-3 m^2) that is 0.7 m from the emitting plate with a 45 angle between the surface normal and the direction of the radiation.

a). What is the solid angle of the receiving surface relative to the emitting surface? b). What is the rate of radiation received by plate 2?

Question 5. An emitting surface (A1=203m2) is diffusely radiating with a total intensity of 100 Wm2sr1 in the normal direction. Radiation from the emitting surface is striking another surface (A2=203m2) that is 0.7m from the emitting plate with a 45 angle between the surface normal and the direction of the radiation. a). What is the solid angle of the receiving surface relative to the emitting surface? b). What is the rate of radiation received by plate 2