Uses elementary methods to introduce a model which accurately describes fundamental properties of a star in radiative equilibrium. (SL)

Presents a new derivation based on simple theorems of probability theory for the established system of equations describing successive decay transitions of quantum systems. It is indicated that this derivation that has a quantum-mechanical foundation might be more appealing to applied physicists than other derivations. (HM)

Advances new explanations for false observations made during 1903-1906 concerning a spurious radiation called N rays. (MLH)

Provides a derivation of the evolution of an initially black-body spectrum in the closed Friedmann universe. (Author/SL)

Described are multichannel analyzers and a high-speed digital counter for a lecture room. (CP)

Presents a derivation of the minimum possible bandwidth of a laser oscillator. (SL)

Analyzes simple electrical circuits, showing that for high frequencies they have frequency and time responses identical to the spontaneous radiative decay of atoms. Compares a two-circuit electrical system with a two-level atom. (MLH)

Shows that radioactivity is a binomially distributed process, based on a probability equation approach, for any value of the observation time. (MLH)

Discusses an experiment for the measurement of the half-life of cosmic ray muons by using a single scintillator detector. (LS)

Explains properties of the Airy packet that show that quantum wave functions correspond to a family of orbits and not to a single particle. Introducing the Airy packet into elementary quantum mechanics courses is recommended. (HM)