Answer :
The following forms of electromagnetic radiation in order of increasing wavelength: clear all infrared visible microwave shortest wavelength second longest wavelength longest wavelength visible<infrared<microwave.
In physics, the wavelength is the spatial period of a periodic wave—the gap over which the wave's form repeats. it is the distance between consecutive corresponding points of the identical segment at the wave, including two adjoining crests, troughs, or 0 crossings, and is a feature of both touring waves and standing waves, in addition to other spatial wave styles. The inverse of the wavelength is known as the spatial frequency. Wavelength is generally detailed with the aid of the Greek letter lambda (λ).
The term wavelength is also every now and then applied to modulated waves, and to the sinusoidal envelopes of modulated waves or waves formed by means of interference of numerous sinusoids. Assuming a sinusoidal wave moving at a hard and fast wave speed, wavelength is inversely proportional to frequency of the wave: waves with higher frequencies have shorter wavelengths, and lower frequencies have longer wavelengths.
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