Light is faster than anything else in the known universe, though its speed can change depending on what it's passing through. When you purchase through links on our site, we may earn an affiliate ...

Your tablet, smartphone, laptop, and flat screen TV all have one thing in common: They each give off blue light. You may know them by the acronym ROY G BIV. Together, they make the white light you see ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. No matter what the ...

Women's Health may earn commission from the links on this page, but we only feature products we believe in. Why Trust Us? At the simplest level, different colors of light have different wavelengths.

Light-emitting diode (LED) light therapy is a cosmetic and medical treatment that uses LED wavelengths to treat various skin conditions, such as acne and psoriasis. You can get this therapy at a ...

If you’ve stumbled into red light therapy videos on social media, you’ve probably heard that it clears acne, reduces wrinkles, reduces inflammation, and heals joints. You may have also heard that it ...

Let there be light — for your pain, skin, and injuries, that is. The possibilities of red light to treat a variety of health and aesthetic concerns are just emerging thanks to interest from ...

If you live in or near a crowded city and have tried to see the stars or a meteor shower in the night sky, you probably had little luck. The reason is light pollution. Light pollution is when urban ...