Hydrogen line
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The hydrogen line, 21 centimeter line, or H I line is a spectral line that is created by a change in the energy state of solitary, electrically neutral hydrogen atoms. It is produced by a spin-flip tr
Horn antenna used by Ewen and Purcell for the first detection of hydrogen line emission from the Milky Way
Hydrogen spectral series
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The emission spectrum of atomic hydrogen has been divided into a number of spectral series, with wavelengths given by the Rydberg formula. These observed spectral lines are due to the electron making
Hydrogen line
…Dark Ages Radio Explorer Hydrogen spectral series Hydrogen-alpha, the visible-red spectral line with wavelength of 656.28 nanometers…
Energy level diagram of electrons in hydrogen atom