It also has a built-in camera with an adjustable zoom so users can locate the laser at a long distance when outdoors, despite the light from the sun. During testing, the GLM400CL appeared to have ...

Reducing blue-light on your Windows PC, Mac, or Chromebook is a good way to protect your circadian rhythm and reduce eye strain. While you can download third-party apps, the latest versions of the ...

Almost everyone is raised with the knowledge that the velocity of light in a vacuum is an absolute value of 299 792 kilometers (186 282 miles) per second. Even a single photon cannot surpass this ...

But first, keep scrolling for my top picks: Annoyingly, there are currently no at-home laser-hair removal devices that are safe to use on dark skin and/or light hair, even if the device says it wo ...

The HP LaserJet M209d is a sterling value among low-cost, print-only mono laser printers. (If you're considering an inkjet but print only occasionally, it's a tempting alternative.) Its paper ...

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The best laser printers on the market are those that reliably deliver pages of high quality at lower printing costs than the competition, without causing you headaches. I know because my team ...

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. And it's not just useful for photography. You can also use a lightboxes to trace artworks, ...

This jet streaming out of a supermassive black hole is traveling at nearly the speed of light. Credit: NASA / JPL-Caltech illustration Superman may fly faster than a speeding bullet, but he'd ...

Laser photocoagulation is a type of laser surgery for the eyes. It's done to treat age-related macular degeneration (AMD). AMD can lead to vision loss. The retina is the layer of nerve cells in the ...

Light therapy (phototherapy) for many types of depression may have fewer and milder side effects and work more quickly than traditional depression treatments. Talk with a doctor before use. Light ...

Looking for an effective way to remove or reduce body hair? Allow us to introduce you to IPL (Intense Pulsed Light) hair removal. Not only does it offer more permanent results than waxing or ...