Is black a colour? Black isn’t in the rainbow, but where does it fit in the colour spectrum? What makes something appear black? An expert explains how we perceive black.

What blue light actually does to your eyes. Blue light, which occupies the 415-455 nanometer range on the light spectrum, penetrates deeper into the eye than other visible light wavelengths.

Visible light occupies merely a sliver of the electromagnetic (EM) spectrum. To study the cosmos in its entirety, scientists must peer beyond visible light using specialized instruments, including ...

Visible light makes up just a small sliver of the entire electromagnetic spectrum of radiation. Waves that are shorter and have higher frequencies like ultraviolet (UV) and x-rays (left) are more ...

Scientists have revived light-sensing neuron cells in organ donor eyes and restored communication between them as part of a series of discoveries that stand to transform brain and vision research.