Different molecules absorb different colors of light, so astronomers use these absorption features as unique «signatures» of the type and quantity of molecules present. (sciencedaily.com)
They have recently tested different colors of light to activate various proteins and cut the time needed for yeast to produce desired chemicals. (sciencedaily.com)
The researchers showed that this mechanism works in four different monolayer materials, all of which emit different colors of light. (nanotech-now.com)