If you shine a light at a mirror, the beam is reflected inward to a central focal point, bouncing back toward you in a predictable manner—it’s a simple reflection of light, a spatial inversion ...

Social media users across the Southwest, including in Arizona, shared photos of a mysterious beam of light in the sky on the night of May 16.

How diamonds reflect and refract light impacts how they appear at different angles. Refraction occurs when light changes ...