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10 Nov 2019
Because of its spin, the proton that makes up the nucleus of hydrogen produces a magnetic field The ground state of hydrogen is therefore split into two levels depending on whether the spin of the electron is parallel or anti-parallel to the spin of the proton This is called hyperfine splitting Transitions between these two levels involve emission of a radio-wave photon of wavelength lambda = 21 cm, the famous 21-cm line By measuring this radiation, radio astronomers can detect clouds of hydrogen gas in our galaxy that are far too cold to radiate optically. What is the energy difference of the two hyperfine levels? What is the value of the average magnetic field felt by the electron?
Because of its spin, the proton that makes up the nucleus of hydrogen produces a magnetic field The ground state of hydrogen is therefore split into two levels depending on whether the spin of the electron is parallel or anti-parallel to the spin of the proton This is called hyperfine splitting Transitions between these two levels involve emission of a radio-wave photon of wavelength lambda = 21 cm, the famous 21-cm line By measuring this radiation, radio astronomers can detect clouds of hydrogen gas in our galaxy that are far too cold to radiate optically. What is the energy difference of the two hyperfine levels? What is the value of the average magnetic field felt by the electron?
Beverley SmithLv2
10 Nov 2019