Cherenkov Radiation | Definition & Production | nuclear-power.com

Cherenkov radiation happens when electrically charged particles, such as protons or electrons, travel faster than light in a clear medium like water. A characteristic blue glow of an underwater nuclear reactor is a classic example. ✍️ | Physics In History

The blue glow is called Cherenkov radiation, and it's caused by very high energy electrically charged particles, such as electrons, traveling faster than the speed of light in a medium, such as water. Think of it like a sonic boom for light. In certain mediums, the speed of light is slower, and particles can travel faster than light in that medium. For example, the speed of light in water is 225,000,000 metres per second, compared to 299,792,458 metres per second in a vacuum, or about 75% the sp

Un télescope Cherenkov à l'observatoire de Meudon

Achieving diffraction limited imaging with an Imaging Air Cherenkov Telescope