Schrodinger's major contribution to quantum theory was to
a. solve the wave equation for electron waves within the hydrogen atom confirming that the electron can only exist in discrete energy levels in that atom.
b. explain that energy is emitted from atoms in high temperature solids as discrete packets of electromagnetic radiation later called "photons"
c. prove that light with frequency above a certain threshold value can cause electrons to be released from certain metals
d. propose that electrons in atoms may exhibit wave-like behavior under some conditions
e. propose that for nanoscale particles like electrons, it is not possible to determine their energy or momentum and their positon simultaneously