Scientists develop a new way to measure the expansion rate of the universe

For years, cosmologists have argued over a simple question with an awkward answer: How fast is the universe expanding right ...

Physicists watch light drift in quantized steps for the first time

In physics, the classical "Hall effect," discovered in the late 19th century, describes how a transverse voltage is generated ...
Science Daily

For the first time, light mimics a Nobel Prize quantum effect

Scientists have pulled off a feat long considered out of reach: getting light to mimic the famous quantum Hall effect. In their experiment, photons drift sideways in perfectly defined, quantized steps ...
Healthline

What’s Blue Light, and How Does It Affect Our Eyes?

Blue light is a high-energy part of visible light from the sun, screens, and light-emitting diode (LED) bulbs. Your cornea and lens don’t block blue light the way they block ultraviolet (UV) rays.