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Energy radiated per minute by a tungsten filament

Calculate the energy radiated per minute from the filament of an incandescent lamp at 2000 K, if the surface area is 5 x 10^-5 m^2 and its relative emittance is 0.85.

Solution Preview

We can consider the filament as a case of blackbody emission.
The energy radiated is given by,

E = A e $ t T^4

(This ...

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Step by step solution to the very interesting problem.