People love the rainbow of ROYGBIV colors: red, orange, yellow, green, blue, indigo and violet. Human eyes perceive visible light as this array of colors. You may notice that some colors you can ...

Researchers have demonstrated the first planar lens that works with high efficiency within the visible spectrum of light -- covering the whole range of colors from red to blue. The lens can resolve ...

Your tablet, smartphone, laptop, and flat screen TV all have one thing in common: They each give off blue light. You may know them by the acronym ROY G BIV. Together, they make the white light you see ...

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 ...

Physicists and vision scientists are lining up behind a provocative claim: the rich color we call purple is not a property of light at all, but a story the brain tells itself. Light in the real world ...

In this International Year of Light, it is particularly appropriate to review the historical concept of what is light and the controversies surrounding the extent of the visible spectrum. Today we ...

Our little-known ability to see infrared light could occur when pairs of photons combine their energies to appear as one "visible" photon Although we do not have X-ray vision like Superman, we have ...

Appearing as a whiteish yellow while overhead and redder when at the horizon, it's clear that the question "what color is the sun?" is actually more complex and difficult than it may initially sound.