What is the green flash? It’s often tied to pirate folklore but also commonly occurs in reality – learn what causes the flash and when to see it. The green flash is a rare, brief optical event of ...

Refraction is the bending of light when it goes from one medium to another so, when a ray of light passes through a glass prism, refraction of light occurs both, when it enters the prism as well as ...

If you enjoyed this article, I’d like to ask for your support. Scientific American has served as an advocate for science and industry for 180 years, and right now may be the most critical moment in ...