Macquarie University researchers have demonstrated a technique to dramatically narrow the linewidth of a laser beam by a ...

Can light itself cast a shadow? It may sound like a philosophical riddle, but researchers have found that under certain conditions, a laser beam can act like an opaque object and cast a shadow ...

Researchers at the Harvard John A. Paulson School of Engineering and Applied Sciences (SEAS) and Technical University of ...

It’s a rare person who can pick up a cheap laser pointer and not wield it like a lightsaber or a phaser, complete with sound effects. There’s just something about the “pew-pew&#82… ...

A new experiment has demonstrated something that sounds physically impossible – light itself casting a shadow. It turns out that if you manipulate a laser just right, then hit it side-on with ...

Have you been considering laser hair removal? WebMD's in-depth content covers laser hair removal, costs, benefits, and side effects.

Red light therapy may help improve some skin conditions. Here's more information about how it may work, why, and what the research says.

This laser causes fewer side effects -- such as swelling, bruising, and redness -- so your recovery time should be faster than with CO2 laser resurfacing.

Here's all you need to know about red light therapy and its numerous potential health benefits, according to current research and experts.

Special relativity prevents any object with mass travelling at the speed of light, and the principle of causality – the notion that the cause comes before the effect – is used to rule out the ...

Intense pulsed light treatment is a cosmetic skin treatment that is similar to laser therapy. Learn more about its uses, safety, and efficacy here.