Before electricity, most people went to bed at sundown because their homes were dark. Candles, the glow of a fireplace and, by the 19th century, lamps using whale oil, lard, kerosene or gas added a ...

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 ...

Funhouse mirrors help us learn about light and reflection. Mirrors are used for more than checking your face in the morning. Scientists have lots of uses for mirrors. Find out more about the different ...

It'll be your next hunt at the flea market.

Dear S.A.: The history of this mirror — or “looking glass” as it would have been called when it was first introduced — starts in the very, very late 18th century or early 19th century. Most references ...

Q: We have a convex mirror that has been in our family well over 50 years. There is some damage to the frame but the mirror itself is in good condition. The mirror is heavy and the frame is made of ...