A tungsten filament in an electric lamp may be approximated as a blackbody radiator…

PHYSICS · Subjective · AP · Physics 2: Algebra-based · Modern Physics · Modern Physics

Problem

A tungsten filament in an electric lamp may be approximated as a blackbody radiator with surface area 2.0 cm22.0\,\text{cm}^2. The maximum intensity in its spectrum occurs at a wavelength of 1.0 μm1.0\,\mu\text{m}. Treating the filament as an ideal blackbody, answer the following: (i) Calculate its absolute temperature. (ii) Determine the total power it emits. (Use σ=5.67×10−8 W m−2K−4\sigma=5.67\times10^{-8}\,\text{W\,m}^{-2}\text{K}^{-4} and b=2.898×10−3 m Kb=2.898\times10^{-3}\,\text{m\,K}.)

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