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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.
In order to operate the tutorial, first choose an exciting wavelength by using the mouse cursor to translate the Wavelength (or Energy) slider to the desired position. Next, use the mouse to press the blue Pulse button, which will excite the atom by absorption of a photon of the chosen wavelength.