Wavelength. The distance existing between crests or valleys consecutive is what we call length wave. The wavelength of a wave describes how long the wave is . Waves water in the ocean , waves air , and waves of electromagnetic radiation having wavelengths. The wavelength represents the actual distance traveled by a wave that does not always coincide with the distance from the medium or the particles in which the wave propagates.
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- 1 Wavelength equation.
- 3 Wavelength of electromagnetic radiation
- 4 Related Links.
- 5 External Links.
The Greek letter “λ” (lambda) is used to represent the wavelength in equations. The wavelength is inversely proportional to the frequency of the wave. A long wavelength corresponds to a low frequency, while a short wavelength corresponds to a high frequency. The unit of measurement of the wavelength is the meter , like that of any other length. Wavelength can be from very small, measured using from one nanometer (one billionth of a meter) and angstroms (ten billionth of a meter) to hundreds of meters.
λ = c / f. where “λ” is the wavelength, “c” is the speed of propagation of the wave, and “f” is frequency. Wavelength and frequency are inversely proportional, that is, at high frequencies, small wavelengths and vice versa.
Wavelength of electromagnetic radiation
The wavelength of radiation can be from very small, in the case of so-called gamma radiation, to very large in radio waves . It is measured, therefore, using from nanometers and angstroms to hundreds of meters, where a nanometer is one billionth of a meter (1 m = 109 nms) and that an Angstrom is ten thousand millionth of a meter (1 m = 1010 A), so one nanometer equals 10 Angstrom (1nm = 10 A). The light we receive from the Sun is electromagnetic radiation that travels at 300,000 km / s, in its entirety, but the wavelength is not the same in all photonsluminous, it varies between 4000 A and 7000 A, approximately, or what is the same, between 400 nm and 700 nm. White light ultimately breaks down into a spectrum of different colored bands , each defined by a different wavelength. Thus, the light with the shortest wavelength is violet light , which is around 4,000 Angstroms, and the light with the longest wavelength is red light, which is around 7,000 Amstroms. Radiations of wavelength less than violet are called ultraviolet , X-ray , and Gamma-ray radiation., in decreasing order of wavelength. Radiations with a wavelength greater than red are called infrared , microwave, and radio waves, in increasing order of wavelength.
|RADIATION TYPE||Wavelength ranges|
|Gamma rays||less than 10-2 nanometers|
|X-rays||between 10-2 nanometers and 15 nanometers|
|Ultraviolet||between 15 nanometers and 4,102 nanometers|
|Visible spectrum||between 4,102 nanometers and 7.8,102 nanometers|
|Infrared||between 7.8.102 nanometers and 106 nanometers|
|Microwave Region||between 106 nanometers and 3,108 nanometers|
|Radio waves||greater than 3,108 nanometers|