Problem 8.4 The tungsten filament of an old-style light bulb reaches a temperature of about 3300 K. Assume that it radiates as a perfect blackbody. A) What is the peak wavelength max? In what part of the spectrum does it lie? B) What is the surface area of a 100 W filament? C) Asses this device's efficiency as a light source by computing the fraction of the radiation that falls in the visible spectrum, 400-700 nm.
Problem 8.4 The tungsten filament of an old-style light bulb reaches a temperature of about 3300 K. Assume that it radiates as a perfect blackbody. A) What is the peak wavelength max? In what part of the spectrum does it lie? B) What is the surface area of a 100 W filament? C) Asses this device's efficiency as a light source by computing the fraction of the radiation that falls in the visible spectrum, 400-700 nm.
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Transcribed Image Text:Problem 8.4
The tungsten filament of an old-style light bulb reaches a temperature of about
3300 K. Assume that it radiates as a perfect blackbody.
A) What is the peak wavelength max? In what part of the spectrum does it lie?
B) What is the surface area of a 100 W filament?
C) Asses this device's efficiency as a light source by computing the fraction of
the radiation that falls in the visible spectrum, 400-700 nm.
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