While violet hits your eye with a specific wavelength, purple only exists in your perception — a clever construct built from conflicting input.

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 ...

In an innovative discovery that defied centuries of colour theory, scientists revealed that purple isn’t a real colour at all—but a clever illusion created by the brain. According to new research, ...

Described as a kind of blue-green, the new color—named “olo”—can only be seen using lasers to manipulate certain ...

It is easy to remember them by using the name “Roy G. Biv.” A rainbow is a spectrum of visible light. Each color has a different wavelength. To separate white light into these colors, the light needs ...

Scientists at UC Berkeley have developed a groundbreaking technique that allows humans to see a color they’ve never experienced before. This method — dubbed “Oz” — enables people to perceive a unique ...

There are three primary colours of light, which can be combined to make secondary colours. A rainbow contains all the colours of the visible spectrum. It is often possible to see a secondary bow ...

Greetings, stargazers. Spring is galaxy season for many amateur astronomers. However, when looking through an eyepiece instead of a camera for astrophotography, you might think of this as the season ...