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 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...

This resource illustrates classical energy diagrams for 1D motion. It simulates an experiment where the energy of a cart with a magnet can be changed by putting magnets along a track. The resultant potential and...