Is purple truly a colour, or merely a clever illusion created by the brain? According to scientists, purple doesn’t exist on ...

They're your eyes, and they receive signals that fall in the range of visible ... spectrum. Here's a tour that begins with radio waves and takes you through microwaves, infrared radiation, light ...

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 ...

This range of colors is all that the human eye is capable of seeing—our "visible light spectrum." But what happens when waves get even longer or shorter? Looking at a chart, one quickly realizes ...