Learn about additive mixtures in this activity. Understand how your rods and cones work together to see color.

In this full-color image, a neuron is expressing the light-gated cation channel channelrhodopsin-2 (small green shapes), and is being illuminated by a focused beam of blue light (coming from the top).

Explains where visible light fits into the electromagnetic spectrum and the wavelengths for the different colors we see.