ON THE THEORY OF EMISSION AND ABSORPTION OF ELECTROMAGNETIC-RADIATION- AN ARGUMENT

A more complete than usual use of the argument of the identity of phot ons is suggested for the teaching of radiation processes at the elemen tary level. The argument uses the concept of 'observability', known fr om system theory for estimating in the quantum-mechanical and statisti cal contexts, of the probability of occurrence of a casual process. Th e introductory discussion in Section 2 explains the reasonability of l earning optoelectronics in the device-applicative, physical and system -theoretic aspects, with some emphasis associated with the research in terests and pedagogical views of the author.