This electron gun converts photons of light into electrons. A radiofrequency field in the gun energizes the electrons, blasting them off into the accelerator.
Thermoelectric generators probably won’t eliminate the charger for your Apple Watch, but for smaller, screenless wearables, the heat constantly escaping from your skin could fundamentally change how we power our devices.
This common science demonstration has been an enduring mystery. Now, this electrical engineer has started to figure it out.
An effort to bounce radar off the ionosphere across vast distances was too late for the Cold War, but it may help make Arctic shipping lanes safe.
Not even the greats can escape the droll of bureaucracy, it seems.
1,600 respondents answered 10 questions about central issues in physics, from the Big Bang to black holes, cosmic inflation, and quantum gravity. The results are…interesting.
Eleven missing or dead scientists are now at the center of a federal investigation, and three had direct ties to NASA.
