Although Christmas may be several weeks behind us, various colorful LED contraptions can nowadays be found in our houses at any time of year. [Tim] got his hands on an LED curtain that came with a ...

When the chandelier starts flickering, don’t blame it on a ghost. Time to learn how to wire a light switch. You know that you need to change a switch when the lights go in and out, or if they make a ...

Although the detailed physics of what goes on inside a laser is typically complex, all conventional lasers share a common basic operational principle: a process known as the stimulated emission of ...