Keeping Track of Energy Levels, Photon Emissions and Absorbsions
In his Autobiographical Notes in 1949, Einstein wrote of the special theory It is striking that the theory introduces two kinds of physical things, i.e., (1) measuring rods and clocks, and (2) all other things, e.g., the electromagnetic field, the material point, etc. In the last blog entry, we set the measuring rods to picometers … More Keeping Track of Energy Levels, Photon Emissions and Absorbsions