I have a solar blind photomultiplier tube which uses the photoelectric effect to produce electrons when light hits the photocathode. It is called solar blind becaue it responds to ultraviolet photons with a frequency of greater than 1015 Hz, but doesn't respond to visible or infrared photons with a lower frequency. Given Planck's constant of 4.14 x 10-15 eV-s, what is the work function of the photocathode?
  1. 0.25 eV
  2. 4 eV
  3. 2.5 x 1029 eV
  4. 40 meV
  5. 25 MeV



Classically, when an electromagnetic wave scatters from a charged particle, it does so by its electric field producing a force on the charge, causing it to vibrate with the electric field. The charge then emits secondary radiation because of the acceleration of the charge. What is the expected frequency of the emitted radiation?
  1. less than or equal to that of the EM wave
  2. equal to the EM wave
  3. greater than the EM wave
  4. less than, equal to, or greater than the EM wave
  5. It shouldn't radiate.