Illustrating the angles subtended at the eye by one lamp and the image of the other as seen in the mirror.
In this article we show how similar principles can be used to move a polystyrene ball in a circular path.
Matter can be described and explained in a number of ways, using models of increasing complexity depending on the intended audience.
The nature of light and how it is affected by gravity is discussed.
The notorious ease with which headphone flex becomes knotted provides the basis for classroom projects showing how cutting-edge mathematics and exp
Robert A. J. Matthews
In the Bohr theory of the atom, electrons are pictured as particles moving in fixed paths, or orbits, around the nucleus rather like planets revo