This is an English translation of the 1905 article by Albert Einstein that establishes the relation between the mass and energy of a particle. The article was published in the book The Principle of Relativity and...

This resource illustrates the interference patterns for diffraction through double slits. A series of sources, electrons, protons, neutrons, photons, and pions, can be chosen for the virtual experiment. The energy of the...

This website from Antonio Carlos M. De Queiroz, an associate professor at the Federal University of Rio de Janeiro, illustrates a number of different electrostatic machines. The site includes details and images of...

This resource shows the energy states for single or multiple square-well systems, modeling the properties of a periodic solid. The number of wells, and their depth, width, and spacing can all be changed. Additionally,...

The National Renewable Energy Laboratory (NREL) is the nation's primary laboratory for renewable energy and energy efficiency research and development and their mission is focused on advancing the U.S. Department of...