radioluminescence
Quick Summary
Radioluminescence is a phenomenon where a material emits light when excited by radioactive particles or radiation. This process involves radioactive elements, such as alpha particles, electrons, and gamma rays, interacting with a suitable material, often a crystal phosphor.12
Key aspects of radioluminescence include:
* Excitation: Radioactive substances cause luminescence by emitting particles or radiation.21
* Applications: This principle is used in self-luminous paints for watch dials and instruments, which contain a phosphor and a radioactive substance like tritium or radium.2
* Natural Occurrence: The aurora borealis is a natural example, where particles from the sun interact with Earth's geomagnetic field and atmosphere.2
Unlike incandescence, radioluminescence is a form of "cold light" as it does not involve high temperatures.3
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