Physicists use a 350-year-old theorem that explains the workings of pendulums and planets to reveal new properties of light waves. Since the 17th century, when Isaac Newton and Christiaan Huygens ...

Gauging the amount of light that's in a scene is one of the most fundamental and important skills for a photographer to have. Knowing how to set the exposure on a camera will produce a picture that's ...

The best light meter for photography is rarely at the forefront of the average photographer’s mind nowadays, thanks to the reliability of in-camera light meters and handy metering aids such as ...