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Wavelength is commonly designated by the Greek letter lambda (Î»). The concept can also be applied to periodic waves of non-sinusoidal shape. The term wavelength is also sometimes applied to modulated waves, and to the sinusoidal envelopes of modulated waves or waves formed by interference of several sinusoids.here L is the slit width, R is the distance of the pattern (on the screen) from the slit, and Î» is the wavelength of light used. The function S has zeros where u is a non-zero integer, where are at x values at a separation proportion to wavelength.
It has colors ordered from highest to lowest frequency. where #f# is frequency and #lambda# is wavelength. Since #c#, the speed of light, remains constant, as frequency goes up, wavelength must go down. Therefore violet has the highest frequency and the shortest wavelength of the visible colors of light. And red has the lowest frequency and the longest wavelength of the visible colors of light.