Obviously the wavelength of a laser can’t be measured with a scale as large as that of a carpenter’s tape measure. At least not directly and that’s where a Compact Disc comes in. [Styropyro] uses a CD ...

People keep searching for “burning laser hacks,” but that’s a fast way to get hurt or start a fire. This video breaks down why these hacks are risky and what makes lasers dangerous even when they look ...

Having a stable laser level is critical for almost any home improvement project. Try this hack next time to keep yours ...

You might think that anything to do with a soap bubble is for kids. But it turns out that observing light scattering through a soap bubble produces unexpected results that may lead to insights into ...