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? (o = 5.67 x 10- W/m - K4, Wien displacement law constant is 2.9 x 10-5 m - K) O 1200 nm O 1800 nm O 1400 nm O 1600 nm O 1000 nm