Where Have I Encountered the Photoelectric Effect

Sample Problem 6.3 shows how to determine the energy of a single photon of light of a given wavelength and how to determine the maximum kinetic energy of an electron ejected via the photoelectric effect. 

Setup The wavelengths must be converted from nanometers to meters  

Practice Problenn A Calculate the energy (in joules) of (a) a photon with wavelength 2.11 X 10 mn, and (b) a photon with frequency 1.78 X 10 s . (c) Calculate the kinetic energy of an electron ejected by the photon in part (a) from a metal with a binding energy of 4.66 eV. 

Think About it Remember that frequency and wavelength are inversely proportional (Equation 6.1). Thus, as wavelerrgth decreases, frequency and energy increase. Note that the binding energy becomes less significant as the energy of the incident photon increases. 

1 Calculate the energy per photon of light with wavelerrgth 650 rrm. 

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