Question

A small circular plate has a diameter of 2 cm and can be approximated as a blackbody. To determine the radiation from the plate, a radiometer is placed normal to the direction of viewing from the plate at a distance of 50 cm. If the radiometer measured an irradiation of 129 W/m2 from the plate, determine the temperature of the plate. Take the Stefan-Boltzmann constant as σ = 5.67 x 10-8 W/m2·K4.The temperature of the plate is______________.

Answer 1

Answer: Temperature T = 218.399K.

Explanation:

Q= 129W/m2

σ = 5.67 EXP -8W/m2K4

Q= σ x t^4

t = (Q/σ)^0.25

t= 218.399k