\-▐leŋ(k)th\ n (1850) Distance between two successive points of a periodic wave in the direction of propagation in which the oscillation has the same phase; designated as λ in spectrophotometry. It is usually measured in nanometers or, formerly, in Angstrom units (1 nm = 10A). See Frequency. (Giambattista A, Richardson R, Richardson RC, Richardson B (2003) College Physics. McGraw Hill Science, New York; Saleh BEA, Teich MC (1991) Fundamentals of Photonics. John Wiley and Sons, New York)
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Gooch, J.W. (2011). Wavelength. In: Gooch, J.W. (eds) Encyclopedic Dictionary of Polymers. Springer, New York, NY. https://doi.org/10.1007/978-1-4419-6247-8_12729
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