Explain why the classical theory of light as an electromagnetic
wave (or of electrons as particles) is unable to explain the
following phenomena whereas quantum mechanics is successful.
(1) The turn-on voltage of differently colored LEDs
(2) The existence of transparent conductors
(3) The decrease in frequency of photons scattered off of
atoms
(4) The spectrum of blackbody emission
For each, use 2-3 sentences, 1-2 equations, and a diagram to
provide an explanation that is concise yet precise.