Unless you’re in a carnival funhouse, mirrors are generally dead flat and kind of boring. Throw in some curves and things get interesting, especially when you can control the curve with a touch of ...

Casting of the secondary mirror for the European Southern Observatory’s Extremely Large Telescope has been completed in Mainz, Germany. Weighing 3.5 tons and measuring 14 feet in diameter, the ...

A spherical mirror is that mirror whose reflecting surface is the part of a hollow sphere of glass. Spherical mirrors are of two types: concave mirrors and convex mirrors. In a concave mirror ...