Difference between revisions of "Electromagnetic spectrum"
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| − | The electromagnetic spectrum is often shown as a range of [[Photons|photon]] energies and their names. Since, for electromagnetism, energy = frequency times a constant, as frequency goes up the energy of a photon goes up, so the highest energy photons have the highest frequency. Apparently the equation E=hv was just a guess by Max Plank, at the time there was no experimental or theoretical justification for the equation. A photon with a frequency of 1 Hz would thus have an energy of h which is equal to 6.62607015×10<sup>−34</sup> Joule | + | The electromagnetic spectrum is often shown as a range of [[Photons|photon]] energies and their names. Since, for electromagnetism, energy = frequency times a constant, as frequency goes up the energy of a photon goes up, so the highest energy photons have the highest frequency. Apparently the equation E=hv was just a guess by Max Plank, at the time there was no experimental or theoretical justification for the equation. A photon with a frequency of 1 Hz would thus have an energy of h times 1/second which is equal to 6.62607015×10<sup>−34</sup> Joule. |
[[File:EM_spectrum.png|800px]] | [[File:EM_spectrum.png|800px]] | ||
Revision as of 14:24, 22 March 2020
The electromagnetic spectrum is often shown as a range of photon energies and their names. Since, for electromagnetism, energy = frequency times a constant, as frequency goes up the energy of a photon goes up, so the highest energy photons have the highest frequency. Apparently the equation E=hv was just a guess by Max Plank, at the time there was no experimental or theoretical justification for the equation. A photon with a frequency of 1 Hz would thus have an energy of h times 1/second which is equal to 6.62607015×10−34 Joule.
