Knowing an average is not enough to properly describe a data set. You also need a measure of how dispersed the data is. Values that are packed closely together display greater consistency than those ...

ON p. 413 of NATURE (March 5) Prof. Schott attempts to show that there is an irreconcilable inconsistency between Drude's dispersion formula and Balmer's formula for the lines in the hydrogen spectrum ...

THE dispersion formula of Kramers and Heisenberg is valid for an atomic system the dimensions of which are small compared with the wave-length of incident light. For very short waves the scattering ...