s between 400 nanometer
s and 750 nanometers. Electromagnetic radiation within this range can be detected by the human eye
. Colors depend on the wavelength lengths; a short wavelength (the 400 nm side) looks blue
and a long wavelength (the 750 nm side) looks red
From the BioTech Dictionary at http://biotech.icmb.utexas.edu/. For further information see the BioTech homenode.