Light of a particular wavelength does not eject electrons from the surface of a given metal.
(a) Should the wavelength of the light be increased or decreased in order to cause electrons to be ejected?
(b) Choose the best explanation from among the following:
I. The photons have too little energy to eject electrons. To increase their energy, their wavelength should be increased.
II. The energy of a photon is proportional to its frequency; that is, inversely proportional to its wavelength. To increase the energy of the photons so they can eject electrons, one must decrease their wavelength?