Visible light spectrum

Waves have a defined frequency Frequency is measured in hertz (waves per second). For each type of wave, a longer wavelength means a lower frequency – for electromagnetic waves, for example, microwaves have a much lower frequency than UV waves. Waves also have a defined period.

Explanation: There are seven regions in the electromagnetic spectrum which in order of lowest to highest frequency are: Radio waves, microwaves, infrared, visible light, ultraviolet, X-rays and gamma rays .

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

Electromagnetic waves vary in wavelength and frequency . Longer wavelength electromagnetic waves have lower frequencies, and shorter wavelength waves have higher frequencies. Higher frequency waves have more energy.23 May 2019

They only differ from each other in wavelength . Wavelength is the distance between one wave crest to the next. Waves in the electromagnetic spectrum vary in size from very long radio waves the size of buildings, to very short gamma-rays smaller than the size of the nucleus of an atom.

The behavior of EM radiation and its interaction with matter depends on its frequency, and changes qualitatively as the frequency changes . Lower frequencies have longer wavelengths, and higher frequencies have shorter wavelengths, and are associated with photons of higher energy.