This preview shows page 1. Sign up to view the full content.
Unformatted text preview: filament resistance with temperature. a) Calculate the temperature of the filament, assuming that the only source of energy loss is its blackbody radiation. b) Find the total power P BB radiated by the filament as blackbody radiation. c) Make a sketch of the spectrum of the radiation (power per unit photon energy interval). At what photon energy is the spectral intensity the highest? What wavelength photon does this correspond to? Compare this to the value of the peak emission wavelength obtained from Wiens displacement law max T = 2.90 10 3 m K d) What fraction of the emitted radiation is contained in the visible part of the spectrum (wavelengths 400 nm to 700 nm)? (You will have to do the integral numerically.) e) What fraction of the electrical power drawn by the filament is converted into blackbody radiation? What fraction is converted into visible radiation?...
View
Full
Document
This note was uploaded on 11/06/2010 for the course PHY 369 taught by Professor Staff during the Fall '08 term at University of Texas at Austin.
 Fall '08
 Staff
 Thermodynamics, Work

Click to edit the document details