When you flip a switch or power up your smartphone, the last thing on your mind is whether that light could be messing with ...

For the experiment, a high-power green laser was directed through ruby cube and illuminated with a blue laser from the side. The green laser increases the optical absorption of the blue illuminating ...

Compact and durable, the 450-lumen Aria 2 RGB from Petzl is a dual-fuel headlamp that can handle being dropped, dunked, and dusted. When work or play leaves you in the dark, a headlamp or flashlight ...