The world is awash with the color purple — lavender flowers, amethyst gemstones, plums, eggplants and purple emperor ...

How can we measure visible light? The electromagnetic spectrum includes all forms of light energy, known as electromagnetic radiation. (1) Different types of electromagnetic radiation such as radio ...

Chinese researchers have developed infrared contact lenses that convert infrared light into visible light, potentially enabling humans to see in the d ...

Visible light waves vary in length from 380 nanometers ... retina at the back of your eye from damaging UV rays, for example. Those structures don’t keep out blue light. And you’re exposed ...

For instance, when light passes through glass, it slows down and then speeds up as it exits. This change in speed affects the ...

We are surrounded by waves. tiny vibrational ... creating technologies where light and sound appear to disobey conventional rules. The marquee example of this new style of materials is the ...

For example, when infrared light is passed ... infrared light of wavelength around 1550 nm to 622 nm visible light. The output light wave can be detected using traditional silicon-based cameras.

Physicists have shown that ultra-thin two-dimensional materials such as tungsten diselenide can rotate the polarization of visible light ... centuries that light exhibits wave-like behaviour ...