RegionWavelengthFrequencyVisible (blue)400 nm7.5 × 1014 HzVisible (red)700 nm4.3 × 1014 HzInfrared10000 nm3 × 1013 HzMicrowave1 cm30 GHzElectromagnetic Spectrum | COSMOS – Centre for Astrophysics and … astronomy.swin.edu.au › cosmos › electromagnetic+spectrum