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	Rydberg constant - Wikipedia, the free encyclopedia
		The Rydberg constant, named after physicist Janne Rydberg, is a physical constant discovered when measuring the spectrum of hydrogen, and building upon results from Anders Jonas Ångström and Johann Balmer.
		The Rydberg constant is one of the most well-determined physical constants with a relative experimental uncertainty of less than 7 parts per trillion.
		The ability to measure the Rydberg constant directly to such a high precision confirms the proportions of the values of the other physical constants that define it.
	en.wikipedia.org /wiki/Rydberg_constant (232 words)

	Rydberg Transitions
		Rydberg transitions may be split by core asymmetries, but the splittings decrease with increasing n because the core becomes better modeled as a point charge as the electron radius increases.
		The oscillator strength of the lowest Rydberg transition in a series never exceeds 0.08 per degree of degeneracy, whereas for valence shell transitions values of 0.3-1.0 are easy to achieve (the V state transition in ethylene has 0.34).
		Rydberg excitations beyond the first ionization potential are typically broadened by autoionization and appear as a broad band on the continuum.
	vergil.chemistry.gatech.edu /notes/excd/node2.html (1715 words)

	Johannes Rydberg - Wikipedia, the free encyclopedia
		Johannes Robert Rydberg, (‘Janne’ to his friends), (November 8, 1854 - December 28, 1919), was a Swedish physicist mainly known for devising the Rydberg formula, in 1888, which is used to predict the wavelengths of photons (of light and other electromagnetic radiation) emitted by changes in the energy level of an electron in an atom.
		The physical constant known as the Rydberg constant is named after him.
		Excited atoms with very high values of the principal quantum number, represented by n in the Rydberg formula, are called Rydberg atoms, and a crater on the moon is also named Rydberg in his honour.
	en.wikipedia.org /wiki/Johannes_Rydberg (166 words)

	Physics Today March 2001
		The fine-structure constant in the expression for the electron mass is most precisely determined by comparing theory and experiment for the anomalous magnetic moment of the electron, as discussed in box 2.
		A remarkable aspect of this experiment is that the Planck constant, which is the characteristic unit of quantum phenomena, is measured by a two-story-high apparatus, shown in figure 3, that is described by classical mechanics and classical electromagnetic theory.
		As described in box 2, the value of the fine-structure constant is most strongly determined by comparison of theory and experiment for the electron anomalous magnetic moment, and the theoretical expression, in turn, is determined by high-order QED calculations.
	www.physicstoday.org /pt/vol-54/iss-3/p29.html (3210 words)

	Rydberg Atoms and the Quantum Defect
		A Rydberg atom is an atom with a single valence electron in a state with a very large principal quantum number n.
		The many core electrons in a Rydberg atom effectively shield these valence electrons from the electric field of the nucleus.
		Rydberg atoms will closely fit this equation, but they will deviate from the relation because they do not have circular orbits.
	www.phy.davidson.edu /StuHome/joesten/IntLab/final/rydberg.htm (447 words)

	Rydberg, Johannes Robert (Site not responding. Last check: 2007-10-21)
		Rydberg was born in Halmstad and studied at Lund, where he spent his whole career, becoming professor 1897.
		The formula expresses the wave number in terms of a constant common to all series (the Rydberg constant), two constants that are characteristic of the particular series, and an integer.
		Rydberg then went on to produce another formula, which would express the frequency of every line in every series of an element.
	cartage.org.lb /en/themes/Biographies/MainBiographies/R/Rydberg/1.html (186 words)

	Fine Structure Constant Lesson 9
		The Rydberg constant is used in simple equations which mathematically identify the various wave lengths of the spectral lines of hydrogen from the deep infra red to the ultra violet.
		By constant Ra format adjustments of the values of an equation's individual values after each multiplication or division has been performed, the final result of the equation will be accurate.
		Prior to learning that the Fine Structure Constant was called "alpha" I had given two of the Ra formats the respective names of "omega major" and "omega minor" and the ratio that converts numbers of either of these formats to their respective green counterpart in the green format the "omega ratio".
	www.geocities.com /CapeCanaveral/Hall/3324/neferspalace.htm (2569 words)

	Viktor Rydberg -- Encyclopædia Britannica
		Rydberg grew up among strangers, with no home of his own; his mother had died in a cholera epidemic, and his father became an alcoholic.
		(symbol R), fundamental constant of atomic physics that appears in the formulas developed (1890) by the Swedish physicist J. Rydberg, describing the wavelengths or frequencies of light in various series of related spectral lines, such as those emitted by hydrogen atoms.
		The value of this constant is based on the premise that the nucleus of the atom emitting light is...
	www.britannica.com /eb/article-9064545 (632 words)

	Rydberg, Johannes Robert (Site not responding. Last check: 2007-10-21)
		Rydberg is best known for his theoretical studies of spectral series.
		Using wave numbers instead of wavelengths in his calculations, he was able to arrive at a relatively simple expression that related the various lines in the spectra of chemical elements.
		The expression contained a constant term that became known as the Rydberg constant.
	www.phy.bg.ac.yu /web_projects/giants/rydberg.htm (178 words)

	Rydberg constant -- Encyclopædia Britannica
		), fundamental constant of atomic physics that appears in the formulas developed (1890) by the Swedish physicist J. Rydberg, describing the wavelengths or frequencies of light in various series of related spectral lines, such as those emitted by hydrogen atoms.
		Franco-Swiss novelist and political figure Benjamin Constant was the author of Adolphe (1816), a forerunner of the modern psychological novel.
		In Balkan Europe, living is a constant amalgam of the new world and the old, leading most Balkanites to religion as a hope for a better future.
	www.britannica.com /eb/article-9064546 (745 words)

	Optical frequency standards and metrology: The Rydberg constant
		is the permittivity of free space, h is Planck's constant, c is the speed of light in free space and α is the fine-structure constant.
		It may be expressed as a combination of other fundamental constants, and so plays a pivotal role in the CODATA least squares adjustment of the fundamental constants.
		The Rydberg constant therefore plays a vital role in ensuring the self-consistency of the recommended values of the fundamental constants, and by this means checks the integrity of the links between the different SI units.
	www.npl.co.uk /optical_frequency_standards/introduction/hydrogenic_systems/rydberg_constant.html (330 words)

	Physics Today March 2001
		Transition Frequencies in Hydrogen and Deuterium: The Rydberg Constant
		In particular, the four terms beyond the "1" on the right-hand side correspond to contributions from reduced mass, relativistic, radiative, and finite proton size effects, respectively.
		In the 1998 adjustment, 23 transition frequencies or frequency differences in hydrogen or deuterium were included, and the theoretical expressions for the energy levels used in the adjustment were based on many analytic calculations and precise numerical evaluations.
	www.physicstoday.org /pt/vol-54/iss-3/captions/p29box1.html (182 words)

	Rydberg state? (Site not responding. Last check: 2007-10-21)
		A Rydberg state is a state of an atom or molecule in which one of the electrons has been excited to a high principal quantum number orbital.
		Spectroscopically, we talk about a Rydberg series as being the set of bound states of the excited electron for a given set of excited electron angular momentum quantum numbers and ion core state.
		The quantum defect describes how much the Rydberg series departs from the behavior of the Rydberg states of atomic hydrogen, and is directly related to the interaction of the excited electron with the leftover ion core.
	www.phys.ttu.edu /~gglab/rydberg_state.html (409 words)

	IMPLICATIONS OF NON-CONSTANT LIGHT VELOCITY
		Measurements on constants of physics which do not carry dimensions of time (seconds or 1/seconds; or powers thereof) are found to be truly fixed and invariant.
		The energy of an orbiting electron, the fine-structure constant, and the Rydberg constant are also shown to be c-independent and thus truly constant with time.
		If the "universal constants" are different at the position of supernova 1987A, for example, then the physics is different and an observer in that frame should be able to determine that he is in a unique position relative to any other frame of reference and vice-versa.
	www.setterfield.org /cdk/cdkconseq.html (22869 words)

	[No title] (Site not responding. Last check: 2007-10-21)
		For the visible series, the longest wavelength line at 6563 A is assigned the integer three, the line at 4862 A is assigned 4, etc. Later Rydberg generalized the Balmer formula to account for all of the series over all spectral regions.
		Niels Bohr was the first to account for the Rydberg formula in terms of the structure of the and microscopic behavior of the motion of the electron as it moved around the nucleus.
		In addition, the Rydberg constant was determined entirely by other more fundamental constants (electron mass, electron charge, epsilon and h.
	faculty.washington.edu /callis/Chem455/Su-97/C455.Su97.Lec2.abst.html (370 words)

	[No title] (Site not responding. Last check: 2007-10-21)
		The most accurately measured of the fundamental constants, which enters into the formulas for wave numbers of atomic spectra and serves as a universal scaling factor for any spectroscopic transition and as an important cornerstone in the determination of other constants; it is equal to
		For any atom, the Rydberg constant (first definition) divided by 1 + m/M, where m and M are the masses of an electron and of the nucleus.
		is the series limit, R is the Rydberg constant of the atom, and a is an empirical constant.
	www.accessscience.com /Dictionary/R/R33/DictR33.html (1377 words)

	PSIGate - Physical Sciences Information Gateway - Chemical Data Tables
		This is a partial set of the values of the fundamental physical constants recommended by the International Union of Pure and Applied Chemistry.
		The "ice-point" temperature is the temperature of equilibrium of solid and liquid water saturated with air at a pressure of one atmosphere; subtraction of this temperature from an absolute temperature gives the Celsius temperature.
		The Rydberg constant for a nucleus of infinite mass is 2(pi)
	www.psigate.ac.uk /newsite/reference/chemdata/1.html (242 words)

	Optical frequency standards and metrology: Measuring the Rydberg constant
		The Rydberg constant is most accurately determined from spectroscopic measurements in hydrogen, rather than from the combination of fundamental constants of which it is composed.
		Measurements of the Rydberg constant have pushed the limits of optical frequency metrology, and it is currently known with an uncertainty of 7.6 parts in 10
		[2], this is not sufficient to determine the Rydberg constant with higher accuracy because of
	www.npl.co.uk /optical_frequency_standards/introduction/hydrogenic_systems/rydberg_measurements.html (441 words)

	Chemical Sciences: Consequences of the Bohr Model of Hydrogen (Site not responding. Last check: 2007-10-21)
		The Bohr model of the hydrogen atom and the Planck equation E(f) = hf, where h is the Planck constant and f is the frequency of the light, link together the spectrum and the energy structure of the hydrogen atom.
		corresponds to R(inf.), the Rydberg constant for a nucleus of "infinite" mass, that is, a nucleus whose mass is so large that the mass of the electron is neglegible.
		Bohr's success in calculating the exact value of one of the most accurately known physical constants in terms of others was a major advance in the physics of the atom.
	www.ualberta.ca /~jplambec/che/p101/p01222.htm (641 words)

	Rational Quantum Physics
		I shall also submit a conversion of the so-called Rydberg formula for the hydrogen atom, showing that it can be transformed to an expression in which discontinuous quantum masses appear.
		The values of Planck's Constant and the velocity of light are measured in laboratories.
		Niels Bohr could theoretically deduct the value of the Rydberg Constant by means of the measured values of Planck's Constant, the mass and electric charge of the electron, and the velocity of light.
	louis.rostra.dk /quant_03.html (2429 words)

	Johannes Robert Rydberg
		Rydberg was a professor at Lund from 1901 to 1919.
		He is best known for his grouping of the frequencies of certain lines of the emission spectra of the elements into simple series characterized by a running integer and a universal “Rydberg” constant.
		Rydberg also wrote on the structure of the periodic table of the elements.
	www.infoplease.com /ce6/people/A0842790.html (130 words)

	Rydberg constant concept from the Astronomy knowledge base (Site not responding. Last check: 2007-10-21)
		Rydberg constant concept from the Astronomy knowledge base
		abstraction > mathematical concept > number > constant > fundamental physical constant > atomic constant > Rydberg constant
		Next atomic constant: Thomson cross section Up: atomic constant Previous atomic constant: quantum of circulation
	www.site.uottawa.ca:4321 /astronomy/Rydbergconstant.html (41 words)

	[No title] (Site not responding. Last check: 2007-10-21)
		Be sure to show your slope, intercept, and goodness-of-fit.Measured Rydberg constant from slopeTrue Rydberg constant percent error for the hydrogen atom.nm]2.
		See Planck's> constant and energy conversion units in the lab hand-out.6Procedure 2 - Molecular Spectroscopy of FD&C Food DyesWavelength (nm)Yellow #5 %T unknown nameRed #40 %TBlue #1 %TUnknown %TOfor each dye by dividing the absorbance values by the concentration of the dye.TConvert %T data to absorbance using A = 2 - log10(%T).
		Using the true Rydberg constant, calculate the wavelength, in nm, of the n=2 ® n=1 transition QRS2.
	www.cofc.edu /~kinard/153L_HONS_HonorsChemistryLaboratory/Exp_7_Report.xls (403 words)

	Physical (JMSL)
		The units of the physical constants are in SI units, (meter-kilogram-second).
		Returns the value of a constant, given its name, in the specified units.
		representing the units in which the constant is to be returned.
	www.vni.com /products/imsl/jmsl/v20/api/com/imsl/math/Physical.html (566 words)

	Rydberg constant on Encyclopedia.com (Site not responding. Last check: 2007-10-21)
		RYDBERG CONSTANT [Rydberg constant], physical constant used in studies of the spectrum of a substance.
		Details of the 1998 watt balance experiment determining the Planck constant.
		Author:Steiner, Richard Newell, David Williams, Edwin; Publication: Journal of Research of the National Institute of Standards and Technology; Source:MAGS MAGS REED
	www.encyclopedia.com /html/R/Rydbergc.asp (356 words)

	Ch109_Lec_9 March
		By the late nineteenth century folks had found that the line spectra of hydrogen could be described by a simple, empirical, mathematical relationship, known as the Rydberg equation:
		Bohr's equation can be used to derive the Rydberg equation by recalling that the energy of a photon emitted by an atom will be the difference between two electron energy levels:
		= Ae -Br where A and B are constants, e is the base of the natural logs, and r is the radial distance from the nucleus.
	www.humboldt.edu /~rap1/C109.S01/C109Notes.S01/C109n09Mar.htm (766 words)

	Rydberg Function
		The rydberg constant is different for each element since one of the factors in calculating it is nucleus mass.
		(the correct constant is calculated by doing a reduced mass correction to the "infinite" rydberg constant).
		Well I guess you could say that the significance of the constant is that it decides the wavelengts of spectral lines in different elements.
	www.physicsforums.com /showthread.php?p=922692#post922692 (220 words)

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