Lag1989 problem number 23.4

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Uploaded: 30.03.2019
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Description

What is the power of the light bulb, the temperature of the tungsten filament is T = 2650 K? The ratio of the energy luminosity of the thread to the energy luminosity of an absolutely black body at a given temperature is k = 0.31. The area of the radiating surface S = 47mm².

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