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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.
One advantage is that large intensities can be used without danger to the ear. - If an object is smaller than a wave's wavelength, then the wave will simply defract around the object, instead of reflecting off of it (reflection allows you to see objects). This is why objects smaller than the wavelength of visible light do not have color and cannot be seen with light microscopes. - So, the small wavelength of ultrasonic waves means that they can reflect off of very small objects, allowing us to see them. î î î.