A 60 watt electric bulb loses its energy entirely by radiation from the surface of filament. If the surface area of the filament is 4 cm? and its coefficient of emission is 0.4 calculate the temperature of the filament (o = 5.7 × 10-8 S. I. units)

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A 60 watt electric bulb loses its energy
entirely by radiation from the surface of
filament. If the surface area of the filament is 4
cm? and its coefficient of emission is 0.4
calculate the temperature of the filament
(o = 5.7 x 10-8 S. I. units)
Transcribed Image Text:A 60 watt electric bulb loses its energy entirely by radiation from the surface of filament. If the surface area of the filament is 4 cm? and its coefficient of emission is 0.4 calculate the temperature of the filament (o = 5.7 x 10-8 S. I. units)
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