A tungsten filament in a light source is heated to 3300 Kelvins by an electric current passing through it. It is placed

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answerhappygod
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A tungsten filament in a light source is heated to 3300 Kelvins by an electric current passing through it. It is placed

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A tungsten filament in a light source is heated to 3300 Kelvins
by an electric current passing through it. It is placed above a
slab of photoelectric material X.
λmax, in nanometres, for the radiation
emitted by the light source assuming a blackbody spectrum is
878
The filament emits p×10^15 photons per m^3 within
a band of wavelengths of width 0.05λmax centred
around λmax. Find p.
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