What is ultraviolet light, and where does it come from? Learn how UV radiation is classified, measured, and used in medicine, ...

As a result, purple and magenta are known as "nonspectral" colors, because they don't really exist as actual electromagnetic ...

It may sound unbelievable, but reindeer eyes change from a blazing gold in the summer to a deep, dark blue in the winter.

If you live in the southern hemisphere and have been stopped in your tracks by a recent sunset, you may have noticed they ...

For the first time, scientists have imaged the elusive south pole of the sun. The images captured by the Solar Orbiter ...

Astronomers using data from NASA's James Webb Space Telescope have identified dozens of small galaxies that played a starring ...

A new report questions the safety and effectiveness of most sunscreens, but dermatologists say those concerns may be ...

Mother Nature really has been putting on a show during the sunrises and sunsets, that is all thanks to the Canadian wildfire smoke that continues to move into the Midwest.

A Belgo-Dutch startup is developing an alternative to color filters that would let sensors capture all the light shone on ...

You’d divide it by 25 to get the number within the UV index range, and this equals 6.3. Then, you round it to the nearest ...

When a beam of infrared light strikes their ultra-thin lens—barely thicker than a red blood cell—it emerges on the other side ...

Swiss scientists have developed an ultra-thin lens that turns infrared light into visible light using lithium niobate and nanoscale patterns.