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The hydrogen spectral series can be expressed simply in terms of the Rydberg constant for hydrogen and the Rydberg formula. In atomic physics , Rydberg unit of energy , symbol Ry, corresponds to the energy of the photon whose wavenumber is the Rydberg constant, i.e. the ionization energy of the hydrogen atom in a simplified Bohr model.
Johannes (Janne) Robert Rydberg (Swedish: [ˈrŷːdbærj]; 8 November 1854 – 28 December 1919) was a Swedish physicist mainly known for devising the Rydberg formula, in 1888, which is used to describe the wavelengths of photons (of visible light and other electromagnetic radiation) emitted by changes in the energy level of an electron in a hydrogen atom.
This template provides easy inclusion of the latest CODATA recommended values of physical constants in articles. It gives the most recent values published, and will be updated when newer values become available, which is typically every four years.
The Rydberg constant describes the energy levels in a hydrogen atom with the nonrelativistic approximation . The only viable way to fix the Rydberg constant involves trapping and cooling hydrogen. Unfortunately, this is difficult because it is very light and the atoms move very fast, causing Doppler shifts.
Rydberg had a value for his constant, but he had no idea where thatn constant came from. He didn't know that it was a simple (mathematically) function of the charge on the electron, the mass of an electron, the permitivity of free space, and the speed of light - plus another constant that he had no idea about because it wasn't discovered until ...
Jan Rydberg, (1923-2015), Swedish chemist who worked on nuclear chemistry and recycling at Chalmers University of Technology; Johannes Rydberg (1854–1919), Swedish physicist and deviser of the Rydberg formula; Kaisu-Mirjami Rydberg (1905–1959), Finnish journalist and politician; Per Axel Rydberg (1860–1931), Swedish-American botanist
The spectrum is still described well by the Rydberg formula with an angular momentum dependent quantum defect, : = (). The largest shifts occur when the orbital angular momentum is zero (normally labeled 's') and these are shown in the table for the alkali metals : [ 3 ]
Nguyễn Thái Học, founder and leader of the VNQDD, 1930. Nguyễn Thái Học (Vietnamese pronunciation: [ŋwiən˦ˀ˥ tʰaːj˧˦ hawk͡p̚˧˨ʔ]; chữ Hán: 阮 太 學; 1 December 1902 – 17 June 1930) was a Vietnamese revolutionary and independent activist who was the founding leader of the Việt Nam Quốc Dân Đảng, namely the Vietnamese Nationalist Party.