In high-school teaching of mechanics, we deal, among other things, with the nature of static and kinetic friction, forces that are proportional to the normal force. Under the influence of frictional forces, a body moves down a rough sloped decline at a fixed rate of acceleration that is independent of its mass. This situation does not apply to…

Simple measurements of the decay time of cathodoluminescence are described. Cathodoluminescence is used in many devices, including computer monitors, oscilloscopes, radar displays and television tubes. The experimental setup is simple and easy to build. Two oscilloscopes, a function generator, and a fast photodiode are needed for the experiments.…

This article gives examples of science teaching for gifted students from the Young Persons' Institute for the Promotion of Art and Science in Tel Aviv (Israel). Emphasis is on fostering curiosity and experimentation. Examples are offered in teaching about the weather, water, and light and color. A model experiment to teach electricity principles…