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From Longman Dictionary of Contemporary English
Related topics: Broadcasting, Physics, Power
wavelengthwave‧length /ˈweɪvleŋθ/ ●○○ noun [countable]  1 TCBHPthe size of a radio wave used to broadcast a radio signal2 TPHP technical the distance between two points on energy waves such as sound or light3 be on the same/a different wavelength
Examples from the Corpus
wavelengthYou guys ... I guess you must have a wavelength going.The radiation, which comes From the arc in the mercury vapour, is mainly ultraviolet with a wavelength of 253-7 nanometres.A powerful UV/Vis monochromator based detector allows wavelength selection by the turn of a dial and allows very low detection limits.Because the sandwich is only a few angstroms thick it transmits visible light - but it reflects longer wavelength heat radiation.The longer wavelengths associated with heat were radiating through the thick plywood board that covered the one window in his darkroom!Two objects may reflect the same wavelengths into our eyes yet be seen as having different colours.Here, the wavelength is about 5 x 107m.
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