Word: planck
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Dates: during 1930-1939
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Quanta. Having traced the evolution of physics through Relativity, the co-authors close their volume with a discussion of the Quantum Theory. Max Planck provided the first experiments and Einstein the early theory which regards energy as released and received not in continuous flow but in separate little bundles called quanta. A quantum of light is called a photon. Einstein used early Quantum Theory to explain photoelectric action-the ability of photons to knock electrons out of metals...
...Planck's constant (of atomic action...
...nebulae is shifted toward the red end of the spectrum and ordinarily, such a shift indicates receding velocity. But the speeds are so big that many astronomers consider the Expanding Universe may be an illusion, have sought some other cause for the redshift in the spectrum. A decrease in Planck's constant h (energy of light multiplied by its vibration period) might be such a cause. Last year Britain's potent Theorist Paul Adrien Maurice Dirac suggested that the gravitational constant and certain others were dependent on t, the age of the universe, and were therefore slowly altering...
CHARLES E. PLANCK The Air-Track Manufacturing Corp...
...fundamental constants of physics, such as c the velocity of light, h Planck's constant, e the charge and m the mass of the electron, and so on, provide for us a set of absolute units for measurement of distance, time, mass, etc. There are, however, more of these constants than are necessary for this purpose, with the result that certain dimensionless numbers can be constructed from them...