A light bulb filament is constructed from 2 cm of tungsten wire of diameter 50 µm and is enclosed in an evacuated glass bulb. What temperature does the filament reach when it is operated at a power of 1 W ?(Assume the emissivity of the tungsten surface to be 0.04).
(A) 2.44 × 103K
(B) T = 1.99 × 103K
(C) 2.54 × 103K
(D) 2.34 × 103K
