A small surface of area A1 = 5 cm2 emits radiation as a blackbody at T1 = 1000 K.A radiati...

A small surface of area A1 = 5 cm2 emits radiation as a blackbody at T1 = 1000 K.A radiation sensor of area A2 = 3cm2 is placed normal to the direction of viewing from surface A1 at a distance L, as shown in the figure. An optical filter with the following spectral transmissivity is placed in front of the sensor:

If the distance between the radiation sensor and surface A1 is L= 0.5m, determine the irradiation measured by the sensor.