In an experiment electrons are released with a kinetic energy of2.8 eV. The amazing physicists doing the experiments are increasingthe wavelength by 50%. Do you remember what happens? Are thephotoelectrons faster or slower? The energy now is 0.44 eV.
A) Based on that information, what is the material of thecathode? (calculate the work function and compare to table 28.1 inour textbook).
B) What is the initial wavelength of the light?
C) When you go a few pages back in the textbook you can find outthe temperature of a physical object radiating at thatwavelength
