National High Magnetic Field Laboratory
Magnet Academy: Lee De Forest
American inventor Lee De Forest was a pioneer of radio and motion pictures. He received more than 300 patents over the course of his lifetime, the most important of which was for a three-electrode vacuum tube, or triode, that he called...
National High Magnetic Field Laboratory
Magnet Academy: Leon Cooper
Leon Cooper shared the 1972 Nobel Prize in Physics with John Bardeen and Robert Schrieffer, with whom he developed the first widely accepted theory of superconductivity. Termed the BCS theory, it is heavily based on a phenomenon known as...
National High Magnetic Field Laboratory
Magnet Academy: James Clerk Maxwell
James Clerk Maxwell was one of the most influential scientists of the nineteenth century. His theoretical work on electromagnetism and light largely determined the direction that physics would take in the early twentieth century. Indeed,...
National High Magnetic Field Laboratory
Magnet Academy: Theodore Maiman
Theodore Maiman built the world's first operable laser. Ironically, Maiman's first paper announcing this momentous achievement, which many other scientists had been racing to complete themselves, was rejected. Since then, however, lasers...
National High Magnetic Field Laboratory
Magnet Academy: Heinrich Rohrer
Swiss physicist Heinrich Rohrer co-invented the scanning tunneling microscope (STM), a non-optical instrument that allows the observation of individual atoms in three dimensions, with Gerd Binnig. The achievement garnered the pair half...
South Carolina Educational Television
Know It All: Understanding Electricity | Nasa Online
If you want to understand electricity, you first need to know a little about matter, atoms and electrons.
National High Magnetic Field Laboratory
Magnet Academy: Eric Cornell
Born in Palo Alto, California, and raised in Cambridge, Massachusetts - homes to Stanford and the Massachusetts Institute of Technology, respectively - you could say Eric Cornell was destined to become a renowned scientist. And while he...
National High Magnetic Field Laboratory
Magnet Academy: Heinrich Hertz
The discovery of radio waves, which was widely seen as confirmation of James Clerk Maxwell's electromagnetic theory and paved the way for numerous advances in communication technology, was made by German physicist Heinrich Hertz. In the...
National High Magnetic Field Laboratory
Magnet Academy: John Ambrose Fleming
John Ambrose Fleming was an electronics pioneer who invented the oscillation valve, or vacuum tube, a device that would help make radios, televisions, telephones and even early electronic computers possible. A brilliant innovator,...
National High Magnetic Field Laboratory
Magnet Academy: Enrico Fermi
Enrico Fermi was a titan of twentieth-century physics. He outlined the statistical laws that govern the behavior of particles that abide by the Pauli exclusion principle and developed a theoretical model of the atom in his mid-twenties....
National High Magnetic Field Laboratory
Magnet Academy: Siegmund Loewe
Siegmund Loewe was a German engineer and businessman that developed vacuum tube forerunners of the modern integrated circuit. He pioneered both radio and television broadcasting, and the company he established with his brother, David...
Internet History Sourcebooks Project
Fordham University: Modern History Sourcebook: Michael Faraday (1791 1867)
Contains brief biographical information on Michael Faraday, as well as the text of the following lectures delivered by Faraday: The Force of Gravitation, Gravitation-Cohesion, Cohesion-Chemical Affinity, Chemical Affinity-Heat,...
National High Magnetic Field Laboratory
Magnet Academy: Crookes Tube 1870
English chemist Sir William Crookes (1832 - 1919) invented the Crookes tube to study gases, which fascinated him. His work also paved the way for the revolutionary discovery of the electron and the invention of X-ray machines.
National High Magnetic Field Laboratory
Magnet Academy: John Daniel Kraus
For a man whose career involved the entire known universe, John Kraus had a remarkably insular upbringing. He was born and raised in Ann Arbor, Michigan, and earned his bachelor's, master's and doctoral degrees in physics, all at the...
National High Magnetic Field Laboratory
Magnet Academy: Inductive Reactance
Like resistance, reactance slows an electrical current down. Explained by Lenz's Law, this phenomenon occurs only in AC circuits. (Java tutorial)
National High Magnetic Field Laboratory
Magnet Academy: John Bardeen
John Bardeen was one of a handful of individuals awarded the Nobel Prize twice and the first scientist to win dual awards in physics. Both times, he shared the prize with others. The first time his co-recipients were Walter Brattain and...
Cosmo Learning
Cosmo Learning: Applied Science and Technology 210: Electrical Engineering
A collection of video lectures from a course that explores the application of electrical engineering topics. Webpage includes twenty-eight lectures from a professor at the University of California, Berkeley. Lectures vary in length and...
Khan Academy
Khan Academy: Light: Electromagnetic Waves, Electromagnetic Spectrum and Photons
This article discusses the properties of electromagnetic radiation and photons.
Sophia Learning
Sophia: Electric Circuits: Lesson 2
This lesson will explain how to calculate voltage, current, and resistance in simple electric circuits. It is 2 of 4 in the series titled "Electric Circuits."
Sophia Learning
Sophia: Electric Circuits: Lesson 4
This lesson will explain how to calculate voltage, current, and resistance in simple electric circuits. It is 4 of 4 in the series titled "Electric Circuits."
Vision Learning
Visionlearning: Physics: Light Ii: Electromagnetism
Instructional module focusing on light and electromagnetism. Discussion includes historical discoveries that led to the understanding of the electromagnetic spectrum. Site also includes an interactive practice quiz and links relating to...
University of Colorado
University of Colorado: Ph Et Interactive Simulations: Generator
Generate electricity with a bar magnet! Discover the physics behind the phenomena by exploring magnets and how you can use them to make a bulb light. Java required.
University of Colorado
University of Colorado: Ph Et Interactive Simulations: Faraday's Electromagnetic Lab
Investigate with a bar magnet and coils to learn about Faraday's law. You can also play with electromagnets, generators, and transformers!
Florida State University
Florida State University: Inductance
This article surveys inductance and its different forms. It discusses numerous topics associated with inductance such as Faraday's Law, self and mutual inductance, inductors, and magnetic field lines.