Imagine thermal radiation interacting with atoms in a hot gas, in interstellar space, or in sodium lamp. Before Schroedinger proposed his wave equation, the basic dogma of quantum theory was that the atoms perform " quantum jumps " between " stationary states ". But Schroedinger's equation does not imply that such jumps even exist. Instead, Schroedinger showed that the dipole moment of the atom can oscillate harmonically at the frequencies that are given by differences of the proper values of the Hamilton operator. He did not use nor accept quantum jumps. Do you think the picture of atoms being present in preferred states and only jumping between them is still correct today? If yes, - what is the evidence for the jumps? - how long does it take to make such a jump? If no, do you think spectroscopic measurements can be explained in the framework of continuous oscillation of atomic dipole moments, along the way Schroedinger proposed?