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It equals the spatial frequency. For example, a wavenumber in inverse centimeters can be converted to a frequency expressed in the unit gigahertz by multiplying by 29.979 2458 cm/ns (the speed of light, in centimeters per nanosecond); [5] conversely, an electromagnetic wave at 29.9792458 GHz has a wavelength of 1 cm in free space.
Conversion: Wavelength to Frequency and vice versa – Sound waves and radio waves; Teaching resource for 14–16 years on sound including wavelength Archived 2012-03-13 at the Wayback Machine; The visible electromagnetic spectrum displayed in web colors with according wavelengths
In frequency (and thus energy), UV rays sit between the violet end of the visible spectrum and the X-ray range. The UV wavelength spectrum ranges from 399 nm to 10 nm and is divided into 3 sections: UVA, UVB, and UVC. UV is the lowest energy range energetic enough to ionize atoms, separating electrons from them, and thus causing chemical reactions.
Radio frequency (RF) is the ... Frequency range Wavelength range ... conversion between wavelength and frequency Archived 2012-03-11 at the Wayback Machine;
Its frequency is thus the Lyman-alpha hydrogen frequency, increased by a factor of (Z − 1) 2. This formula of f = c / λ = (Lyman-alpha frequency) ⋅ ( Z − 1) 2 is historically known as Moseley's law (having added a factor c to convert wavelength to frequency), and can be used to predict wavelengths of the K α (K-alpha) X-ray spectral ...
As a wave, light is characterized by a velocity (the speed of light), wavelength, and frequency. As particles, light is a stream of photons. Each has an energy related to the frequency of the wave given by Planck's relation E = hf, where E is the energy of the photon, h is the Planck constant, 6.626 × 10 −34 J·s, and f is the frequency of ...
where the angular frequency is the temporal component, and the wavenumber vector is the spatial component. Alternately, the wavenumber k can be written as the angular frequency ω divided by the phase-velocity v p, or in terms of inverse period T and inverse wavelength λ.
A frequency changer, an electronic device that converts alternating current (AC) of one frequency to alternating current of another frequency A variable-frequency drive, a type of frequency changer; Frequency conversion in nonlinear optics may refer to various manipulations of the frequency of light