QI Assuming a filament in a 130 W light bulb acts like a perfect blackbody (e- 1), what is the surface area of the hottest portion of the filament if it has a temperature of 60 °C?

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QI Assuming a filament in a 130 W light bulb acts like a perfect blackbody (e-
1), what is the surface area of the hottest portion of the filament if it has a
temperature of 60 "C?
Transcribed Image Text:QI Assuming a filament in a 130 W light bulb acts like a perfect blackbody (e- 1), what is the surface area of the hottest portion of the filament if it has a temperature of 60 "C?
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