An Electric Current Through a Tungsten Filament Maintains Its Temperature

question 19

Multiple Choice

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

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