Eureka!
Electricity and Magnetism
Level
4
An incandescent light bulb in a room with an air temperature of \(300~\mbox{K}\) radiates with a peak wavelength of \(10^{-6}~\mbox{m}\). The bulb draws \(0.5~\mbox{Amperes}\) from the \(120~\mbox{Volt}\) wall electrical outlet. What is the surface area of the filament in the bulb in \(\mbox{m}^2\)?
Assumption
The filament may be modeled as a perfect "black body".
by
David Mattingly