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CHECK YOURSELF ANSWERS
1Blue, since E = hf and blue has larger frequency.
2Since the energy of each photon increases, their number has to decrease to keep the intensity the same.
3X because the stopping voltage is greater, so kinetic energy of electrons is greater so photon energy is greater.
4aThe energy of the electrons does not change.
bThe number of emitted electrons is proportional to intensity so the number of electrons will increase.
5The shift is independent of the incoming wavelength so they are the same.
6Electrons, since they will have the longest wavelength.