Engineering, 14.09.2019 03:30, lilisagaser4505

Ablack 4 cm x 8 cm sheet of metal is heated uniformly with 1000 watts by passing an electric current through it. one face of the rectangle is well insulated. the other face is exposed to vacuum and very cold surroundings. at thermal equilibrium what fraction of the emitted energy is in the wave number range of 0.5 to 2 μm-1 ?

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Ablack 4 cm x 8 cm sheet of metal is heated uniformly with 1000 watts by passing an electric current...