Colored light can be composed of photons with a discrete wavelength or set of wavelengths that cover a range. Use Wolfram|Alpha to find the properties of these colors, such as their effective temperature, wavelength ranges and even what bioluminescent creatures emit them. Compare different colors or identify a color by its wavelength.
Colors of Light
Examine the properties of visible light, including how it is absorbed and emitted and how different spectral colors compare.