An electric current through a tungsten filament maintains its temperature at 2800 K.Assume the tungsten filament behaves as an ideal radiator at that temperature.Near what wavelength does the filament emit the greatest power? (σ = 5.67 × 10-8 W/m2 • K4,Wien displacement law constant is 2.9 × 10-3 m • K)
A) 1000 nm
B) 1200 nm
C) 1400 nm
D) 1600 nm
E) 1800 nm
Correct Answer:
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