An overwhelming majority of handheld devices these days have ambient light sensors built into them. A large percentage of TVs and monitors do, too, and that proportion is growing. The sensors allow ...

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 ...

If you’re shopping for a digital camera, sensor size is one of the first things you’ll hear about. Chances are you’ve seen terms like “crop sensor,” “full frame,” and “micro four-thirds” thrown around ...