Calculations

Wavelength-energy converter

Here, the characteristic quantities of electromagnetic waves can be calculated.


Wavelength 1nm  Nanometre
Wavelength 1⋅10-9m  Metre
Frequency 299.792⋅1015Hz  Hertz  (299.792 PHz)
Energy 1.24⋅103eV  Electron volt  (1.24 keV)
Energy 198.623⋅10-18J  Joule
Wave number 10⋅1061/cm  Inverse centimetre
Range: XUV

Electromagnetic Spectrum

One of the most important findings while developing the concept of quantummechanics was that light can not only be described as electromagnetic wave but also as particle. This particle is called phonon and it has no rest mass. Between the photon energy and the frequency of the electromagnetic wave there is the following relation:

E = h ⋅ ν

Here h = 4.13566733⋅10-15 is the Planck constant.
Since the speed of light c = 299792458 m / s is known, the wavelength can be calculated from the frequency:

λ = c / ν

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