An apparatus of the 70s for measuring thermal conductivity in different materials is used to visualize, through an infrared thermal imaging approach, temperature fields and the heat diffusion process. The observed temperature profiles also suggest solid grounds for a fair mathematical modelling of this phenomenon.

The correct usage of such terminology as "Rayleigh scattering,""Rayleigh lines,""Raman lines," and "Tyndall scattering" is resolved during an historical excursion through the physics of light-scattering by gas molecules. (Author/JN)

Examination of selected material from the history of science can provoke a number of questions about the nature of that activity as indicated in part 1 (SE 533 400). Presented here are some guidelines to help teachers discuss the observation statements and kinds of questions raised in part 1. (JN)

In a first-hand description of accelerator experiments on nuclei of mass three, the ideas that led to the development of acceleration mass spectrometry are traced. (Author)

Discusses 5 innovative experiments conducted by Rutherford in early 1900s utilizing the 30 milligrams of radium salt he personally carried from Europe to Canada in 1903. Traces his work with alpha particles from his original results which determined their nature, charge, and mass, to his technique of backscattering which helped to advance…