<Tr> <Td> Yellow </Td> <Td> 570--590 nm </Td> <Td> 508--526 THz </Td> <Td> 2.10--2.17 eV </Td> </Tr> <Tr> <Td> Orange </Td> <Td> 590--620 nm </Td> <Td> 484--508 THz </Td> <Td> 2.00--2.10 eV </Td> </Tr> <Tr> <Td> Red </Td> <Td> 620--750 nm </Td> <Td> 400--484 THz </Td> <Td> 1.65--2.00 eV </Td> </Tr> <P> Colors that can be produced by visible light of a narrow band of wavelengths (monochromatic light) are called pure spectral colors . The various color ranges indicated in the illustration are an approximation: The spectrum is continuous, with no clear boundaries between one color and the next . </P>

What part of the electromagnetic spectrum has the lowest frequency