In the classical world, a beam of light is a smooth, continuous wave. In the quantum realm, however, photons manifest as the discrete constituents (quanta) of light. These photons can be carefully ...
By squeezing terahertz light beyond its usual limits, researchers have exposed hidden quantum "jiggles" inside a ...
Light can tell you a lot about what matter is doing. Visible light shows a surface. X-rays reveal hidden structure. Infrared ...