View source for Physics:Annus Mirabilis papers

{{short description|Papers of Albert Einstein published in the scientific journal Annalen der Physik in 1905}}
{{DISPLAYTITLE:''Annus Mirabilis'' papers}}
[[File:Einstein patentoffice.jpg|thumb|200px|Einstein in 1904 or 1905, about the time he wrote the ''Annus Mirabilis'' papers]]

The '''''Annus mirabilis'' papers''' (from [[Social:Latin|Latin]] ''[[Physics:Annus mirabilis|annus mīrābilis]]'', "miracle year") are the four papers that [[Biography:Albert Einstein|Albert Einstein]] published in ''[[Physics:Annalen der Physik|Annalen der Physik]]'' (''Annals of Physics''), a [[Scientific journal|scientific journal]], in 1905. These four papers were major contributions to the foundation of [[Physics:Modern physics|modern physics]]. They revolutionized science's understanding of the fundamental concepts of [[Space|space]], [[Physics:Time in physics|time]], [[Physics:Mass|mass]], and [[Physics:Energy|energy]]. Because Einstein published these remarkable papers in a single year, 1905 is called his ''annus mirabilis'' (''miracle year'' in English or ''Wunderjahr'' in German).

The first paper explained the [[Physics:Photoelectric effect|photoelectric effect]], which was the only specific discovery mentioned in the citation awarding Einstein the Nobel Prize in Physics.<ref name = "Nobel Prize">{{cite web | title = The Nobel Prize in Physics 1921 | url = https://www.nobelprize.org/prizes/physics/1921/summary/ | access-date = November 7, 2020 |author = Nobel Foundation}}</ref>  The second paper explained [[Brownian motion]], which led reluctant physicists to accept the existence of [[Physics:Atom|atom]]s. The third paper introduced Einstein's [[Physics:Special relativity|theory of special relativity]]. The fourth, a consequence of the theory of special relativity, developed the principle of mass-energy equivalence, expressed in the famous equation <math>E = mc^2</math> and which led to the discovery and use of [[Physics:Atomic energy|atomic energy]]. These four papers, together with [[Physics:Quantum mechanics|quantum mechanics]] and Einstein's later [[Physics:General relativity|theory of general relativity]], are the foundation of modern physics.

==Background==
[[File:Albert einstein house bern.JPG|thumb|upright=1.15|The ''Einsteinhaus'' on the Kramgasse in Bern, Einstein's residence at the time. Most of the papers were written in his apartment on the first floor above the street level.]]
At the time the papers were written, Einstein did not have easy access to a complete set of scientific reference materials, although he did regularly read and contribute reviews to ''Annalen der Physik''. Additionally, scientific colleagues available to discuss his [[Theory|theories]] were few. He worked as an examiner at the Patent Office in [[Place:Bern|Bern]], Switzerland, and he later said of a co-worker there, Michele Besso, that he "could not have found a better sounding board for my ideas in all of Europe". In addition, co-workers and the other members of the self-styled "Olympia Academy" (Maurice Solovine and Conrad Habicht) and his wife, [[Biography:Mileva Marić|Mileva Marić]], had some influence on Einstein's work, but how much is unclear.<ref>{{cite web | title=Einstein's Wife : The Mileva Question | url=https://www.pbs.org/opb/einsteinswife/science/mquest.htm | publisher=Oregon Public Broadcasting | year=2003 | archive-url=https://web.archive.org/web/20130804040441/http://www.pbs.org/opb/einsteinswife/science/mquest.htm | archive-date=2013-08-04 | access-date=2016-08-02}}</ref><ref>[http://www.esterson.org/Stachel_Joffe.htm Stachel, John, ''Einstein's Miraculous Year'' (1905), pp. liv-lxiii]</ref><ref>Calaprice, Alice, "''The Einstein almanac''". Johns Hopkins University Press, Baltimore, Maryland 2005.</ref>
 
Through these papers, Einstein tackled some of the era's most important physics questions and problems. In 1900, [[Biography:William Thomson, 1st Baron Kelvin|Lord Kelvin]], in a lecture titled "Nineteenth-Century Clouds over the Dynamical Theory of Heat and Light",<ref>''The London, Edinburgh, and Dublin Philosophical Magazine and Journal of Science'', Series 6, volume 2, page 1 (1901)</ref> suggested that physics had no satisfactory explanations for the results of the [[Physics:Michelson–Morley experiment|Michelson–Morley experiment]] and for [[Astronomy:Black body|black body]] radiation. As introduced, special relativity provided an account for the results of the Michelson–Morley experiments. Einstein's explanation of the [[Physics:Photoelectric effect|photoelectric effect]] extended the [[Physics:Old quantum theory|quantum theory]] which [[Biography:Max Planck|Max Planck]] had developed in his successful explanation of black-body radiation.

Despite the greater fame achieved by his other works, such as that on [[Physics:Special relativity|special relativity]], it was his work on the photoelectric effect that won him his Nobel Prize in 1921.<ref>{{Cite web|url=https://www.nobelprize.org/prizes/physics/1921/summary/|title=The Nobel Prize in Physics 1921|website=NobelPrize.org|language=en-US|access-date=2019-08-09}}</ref> The Nobel committee had waited patiently for experimental confirmation of special relativity; however, none was forthcoming until the [[Physics:Time dilation|time dilation]] [[Physics:Ives–Stilwell experiment|experiments of Ives and Stilwell]] (1938<ref>{{cite journal| last = Ives| first = Herbert E.| author2 = Stilwell, G. R. |title = An experimental study of the rate of a moving clock| journal = Journal of the Optical Society of America| volume = 28 | issue = 7| pages = 215–226| year = 1938| doi = 10.1364/JOSA.28.000215 | bibcode=1938JOSA...28..215I}}</ref> and 1941<ref>{{cite journal| last = Ives| first = Herbert E.| author2 = Stilwell, G. R. |title = An experimental study of the rate of a moving clock II| journal = Journal of the Optical Society of America| volume = 31 | issue = 5| pages = 359–374| year = 1941 | doi=10.1364/josa.31.000369 | bibcode = 1941JOSA...31..369I}}</ref>) and Rossi and Hall (1941).<ref>{{cite journal| last = Rossi| first = Bruno| author2 = Hall, David B. |title = Variation of the Rate of Decay of Mesotrons with Momentum| pages = 223–228| date = February 1, 1941| journal = [[Physics:Physical Review|Physical Review]] | volume = 59 | issue = 3 | doi = 10.1103/PhysRev.59.223|bibcode = 1941PhRv...59..223R }}</ref>

==Papers==

===Photoelectric effect===
{{main|Physics:Photoelectric effect}}
The article "On a [[Heuristic]] Viewpoint Concerning the Production and Transformation of [[Physics:Light|Light]]"<ref group=einstein name=einsta /> received March 18 and published June 9, proposed the idea of ''energy quanta''. This idea, motivated by [[Biography:Max Planck|Max Planck]]'s earlier derivation of the law of [[Astronomy:Black-body radiation|black-body radiation]], assumes that [[Physics:Luminous energy|luminous energy]] can be absorbed or emitted only in discrete amounts, called ''[[Physics:Quantum|quanta]]''. Einstein states,

{{quote|Energy, during the propagation of a ray of light, is not continuously distributed over steadily increasing spaces, but it consists of a finite number of [[Physics:Photon|energy quanta]] localised at [[Point (geometry)|points in space]], moving without dividing and capable of being absorbed or generated only as entities.}}

In explaining the photoelectric effect, the hypothesis that energy consists of ''discrete packets'', as Einstein illustrates, can be directly applied to [[Astronomy:Black body|black bodies]], as well.

The idea of light quanta contradicts the wave theory of light that follows naturally from [[Biography:James Clerk Maxwell|James Clerk Maxwell]]'s [[Physics:Maxwell equations|equations]] for [[Physics:Electromagnetism|electromagnetic]] behavior and, more generally, the assumption of [[Physics:Infinite divisibility|infinite divisibility]] of energy in physical systems.

{{quote|A profound formal difference exists between the theoretical concepts that physicists have formed about gases and other ponderable bodies, and Maxwell's theory of electromagnetic processes in so-called empty space. While we consider the state of a body to be completely determined by the positions and velocities of an indeed very large yet finite number of atoms and electrons, we make use of continuous spatial functions to determine the electromagnetic state of a volume of space, so that a finite number of quantities cannot be considered as sufficient for the complete determination of the electromagnetic state of space.

... [this] leads to contradictions when applied to the phenomena of emission and transformation of light.

According to the view that the incident light consists of energy quanta'' ..., ''the production of cathode rays by light can be conceived in the following way. The body's surface layer is penetrated by energy quanta whose energy is converted at least partially into kinetic energy of the electrons. The simplest conception is that a light quantum transfers its entire energy to a single electron ... .}}

Einstein noted that the photoelectric effect depended on the wavelength, and hence the frequency of the light.  At too low a frequency, even intense light produced no electrons.  However, once a certain frequency was reached, even low intensity light produced electrons.  He compared this to Planck's hypothesis that light could be emitted only in packets of energy given by ''hf'', where ''h'' is [[Physics:Planck constant|Planck's constant]] and ''f'' is the frequency.  He then postulated that light travels in packets whose energy depends on the frequency, and therefore only light above a certain frequency would bring sufficient energy to liberate an electron.

Even after experiments confirmed that Einstein's equations for the photoelectric effect were accurate, his explanation was not universally accepted. [[Biography:Niels Bohr|Niels Bohr]], in his 1922 Nobel address, stated, "The hypothesis of light-quanta is not able to throw light on the nature of radiation."

By 1921, when Einstein was awarded the Nobel Prize and his work on photoelectricity was mentioned by name in the award citation, some physicists accepted that the equation {{nowrap|(<math>hf = \Phi + E_k</math>)}} was correct and light quanta were possible. In 1923, [[Biography:Arthur Compton|Arthur Compton]]'s [[Physics:Compton scattering|X-ray scattering experiment]] helped more of the scientific community to accept this formula. The theory of light quanta was a strong indicator of [[Physics:Wave–particle duality|wave–particle duality]], a fundamental principle of [[Physics:Quantum mechanics|quantum mechanics]].<ref>Physical systems can display both wave-like and particle-like properties</ref> A complete picture of the theory of photoelectricity was realized after the maturity of quantum mechanics.

===Brownian motion===
{{main|Brownian motion}}
The article "Über die von der molekularkinetischen Theorie der Wärme geforderte Bewegung von in ruhenden Flüssigkeiten suspendierten Teilchen" ("On the Motion of Small Particles Suspended in a Stationary Liquid, as Required by the Molecular Kinetic Theory of Heat"),<ref group=einstein name=einstb /> received May 11 and published July 18, delineated a [[Stochastic|stochastic]] model of [[Brownian motion]].

{{quote|In this paper it will be shown that, according to the molecular kinetic theory of heat, bodies of a microscopically visible size suspended in liquids must, as a result of thermal molecular motions, perform motions of such magnitudes that they can be easily observed with a microscope. It is possible that the motions to be discussed here are identical with so-called Brownian molecular motion; however, the data available to me on the latter are so imprecise that I could not form a judgment on the question...}}

Einstein derived expressions for the [[Mean squared displacement|mean squared displacement]] of particles. Using the [[Physics:Kinetic theory of gases|kinetic theory of gases]], which at the time was controversial, the article established that the phenomenon, which had lacked a satisfactory explanation even decades after it was first observed, provided empirical evidence for the reality of the [[Physics:Atom|atom]]. It also lent credence to [[Physics:Statistical mechanics|statistical mechanics]], which had been controversial at that time, as well. Before this paper, atoms were recognized as a useful concept, but physicists and chemists debated whether atoms were real entities. Einstein's statistical discussion of atomic behavior gave experimentalists a way to count atoms by looking through an ordinary microscope. [[Biography:Wilhelm Ostwald|Wilhelm Ostwald]], one of the leaders of the anti-atom school, later told [[Biography:Arnold Sommerfeld|Arnold Sommerfeld]] that he had been convinced of the existence of atoms by  Jean Perrin's subsequent Brownian motion experiments.<ref>{{cite book |last=Nye |first=M. |year=1972 |title=Molecular Reality: A Perspective on the Scientific Work of Jean Perrin |location=London |publisher=MacDonald |isbn=0-356-03823-8 }}</ref>

===Special relativity===<!-- This section is linked from June 30 -->
{{main|Physics:Special relativity}}
[[File:Zur Elektrodynamik bewegter Körper.pdf|thumb|Einstein's paper in the original German, "Zur Elektrodynamik bewegter Körper", ''Annalen der Physik'', September 26, 1905.]]
Einstein's "Zur Elektrodynamik bewegter Körper" ("On the Electrodynamics of Moving Bodies"),<ref group=einstein name=einstc /> his third paper that year, was received on June 30 and published September 26. It reconciles [[Physics:Maxwell's equations|Maxwell's equations]] for electricity and magnetism with the laws of mechanics by introducing major changes to mechanics close to the [[Physics:Speed of light|speed of light]]. This later became known as Einstein's [[Physics:Special theory of relativity|special theory of relativity]].

The paper mentions the names of only five other scientists: [[Biography:Isaac Newton|Isaac Newton]], [[Biography:James Clerk Maxwell|James Clerk Maxwell]], [[Biography:Heinrich Hertz|Heinrich Hertz]], [[Biography:Christian Doppler|Christian Doppler]], and [[Biography:Hendrik Lorentz|Hendrik Lorentz]]. It does not have any references to any other publications. Many of the ideas had already been published by others, as detailed in [[Physics:History of special relativity|history of special relativity]] and [[Physics:Relativity priority dispute|relativity priority dispute]]. However, Einstein's paper introduces a theory of time, distance, mass, and energy that was consistent with [[Physics:Electromagnetism|electromagnetism]], but omitted the force of [[Physics:Gravity|gravity]].

At the time, it was known that Maxwell's equations, when applied to moving bodies, led to asymmetries ([[Physics:Moving magnet and conductor problem|moving magnet and conductor problem]]), and that it had not been possible to discover any motion of the Earth relative to the 'light medium' ''(i.e. aether)''. Einstein puts forward two postulates to explain these observations. First, he applies the [[Physics:Principle of relativity|principle of relativity]], which states that the laws of physics remain the same for any non-accelerating [[Astronomy:Frame of reference|frame of reference]] (called an inertial reference frame), to the laws of [[Physics:Electrodynamics|electrodynamics]] and [[Physics:Optics|optics]] as well as mechanics. In the second postulate, Einstein proposes that the speed of light has the same value in all frames of reference, independent of the state of motion of the emitting body.

Special relativity is thus consistent with the result of the [[Physics:Michelson–Morley experiment|Michelson–Morley experiment]], which had not detected a [[Physics:Transmission medium|medium]] of conductance (or [[Physics:Luminiferous aether|aether]]) for light waves unlike other known [[Wave|wave]]s that require a medium (such as water or air). Einstein may not have known about that experiment, but states,
{{quote|Examples of [[Physics:Moving magnet and conductor problem|this sort]], together with the unsuccessful attempts to discover any motion of the earth relatively to the "[[Physics:Luminiferous aether|light medium]]", suggest that the phenomena of [[Physics:Electrodynamics|electrodynamics]] as well as of [[Physics:Mechanics|mechanics]] possess no properties corresponding to the idea of [[Physics:Rest|absolute rest]].}}

The speed of light is fixed, and thus ''not'' relative to the movement of the observer. This was impossible under [[Biography:Isaac Newton|Newtonian]] [[Physics:Classical mechanics|classical mechanics]]. Einstein argues,
{{quote|the same laws of electrodynamics and [[Physics:Optics|optics]] will be valid for all frames of reference for which the [[Equation|equation]]s of mechanics hold good. We will raise this [[Conjecture|conjecture]] (the purport of which will hereafter be called the "Principle of Relativity") to the status of a postulate, and also introduce another postulate, which is only apparently irreconcilable with the former, namely, that light is always propagated in empty space with a definite [[Physics:Velocity|velocity]] '''c''' which is independent of the state of motion of the emitting body. These two postulates suffice for the attainment of a simple and consistent theory of the electrodynamics of moving bodies based on Maxwell's theory for stationary bodies. The introduction of a "[[Physics:Luminiferous aether|luminiferous ether]]" will prove to be superfluous in as much as the view here to be developed will not require an "absolutely stationary space" provided with special properties, nor assign a velocity-vector to a point of the empty space in which electromagnetic processes take place.

The theory ... is based—like all electrodynamics—on the [[Physics:Kinematics|kinematics]] of the [[Rigid body|rigid body]], since the assertions of any such theory have to do with the relationships between rigid bodies ([[Physics:Configuration space|systems of co-ordinate]]s), [[Physics:Clock|clock]]s, and [[Physics:Electromagnetism|electromagnetic processes]]. Insufficient consideration of this circumstance lies at the root of the difficulties which the electrodynamics of moving bodies at present encounters.}}

It had previously been proposed, by [[Biography:George Francis FitzGerald|George FitzGerald]] in 1889 and by Lorentz in 1892, independently of each other, that the Michelson–Morley result could be accounted for if moving bodies were contracted in the direction of their motion. Some of the paper's core equations, the [[Physics:Lorentz transformation|Lorentz transforms]], had been published by [[Biography:Joseph Larmor|Joseph Larmor]] (1897, 1900), [[Biography:Hendrik Lorentz|Hendrik Lorentz]] (1895, 1899, 1904) and [[Biography:Henri Poincaré|Henri Poincaré]] (1905), in a development of Lorentz's 1904 paper. Einstein's presentation differed from the explanations given by FitzGerald, Larmor, and Lorentz, but was similar in many respects to the formulation by Poincaré (1905).

His explanation arises from two axioms. The first is [[Biography:Galileo Galilei|Galileo's]] idea that the [[Physical law|laws of nature]] should be the same for all observers that move with constant speed relative to each other. Einstein writes,
{{quote|The laws by which the states of physical systems undergo change are not affected, whether these changes of state be referred to the one or the other of two systems of co-ordinates in uniform translatory motion.}}

The second axiom is the rule that the [[Physics:Speed of light|speed of light]] is the same for every observer.
{{quote|Any ray of light moves in the "stationary" system of co-ordinates with the determined velocity ''c'', whether the ray be emitted by a stationary or by a moving body.}}

The theory, now called the [[Physics:Special relativity|special theory of relativity]], distinguishes it from his later [[Physics:General relativity|general theory of relativity]], which considers all observers to be equivalent. Special relativity gained widespread acceptance remarkably quickly, confirming Einstein's comment that it had been "ripe for discovery" in 1905. Acknowledging the role of Max Planck in the early dissemination of his ideas, Einstein wrote in 1913 "The attention that this theory so quickly received from colleagues is surely to be ascribed in large part to the resoluteness and warmth with which he [Planck] intervened for this theory". In addition, the improved mathematical formulation of the theory by [[Biography:Hermann Minkowski|Hermann Minkowski]] in 1907 was influential in gaining acceptance for the theory. Also, and most importantly, the theory was supported by an ever-increasing body of confirmatory experimental evidence.

===Mass–energy equivalence===
{{main|Mass–energy equivalence}}
On November 21 ''Annalen der Physik'' published a fourth paper (received September 27) "Ist die Trägheit eines Körpers von seinem Energieinhalt abhängig?" ("Does the Inertia of a Body Depend Upon Its Energy Content?"),<ref group=einstein name=einstd /> in which Einstein deduced what is arguably the most famous of all equations: {{math|''E''&nbsp;{{=}}&nbsp;''mc''<sup>2</sup>}}.<ref>{{cite book |title=E=mc<sup>2</sup>: A Biography of the World's Most Famous Equation |edition=illustrated |first1=David |last1=Bodanis |publisher=Bloomsbury Publishing |year=2009 |isbn=978-0-8027-1821-1 |url=https://books.google.com/books?id=8TX2tFLZ7gYC }}</ref>

Einstein considered the equivalency equation to be of paramount importance because it showed that a massive particle possesses an energy, the "rest energy", distinct from its classical [[Physics:Kinetic energy|kinetic]] and [[Physics:Potential energy|potential energies]]. The paper is based on [[Biography:James Clerk Maxwell|James Clerk Maxwell]]'s and Heinrich Rudolf Hertz's investigations and, in addition, the [[Axiom|axiom]]s of relativity, as Einstein states,

{{quote|The results of the previous investigation lead to a very interesting conclusion, which is here to be deduced.

The previous investigation was based "on the [[Physics:Maxwell's equations|Maxwell–Hertz equations]] for [[Space#Physics|empty space]], together with the Maxwellian expression for the electromagnetic energy of space&nbsp;..."

The laws by which the states of physical systems alter are independent of the alternative, to which of two systems of coordinates, in uniform motion of parallel translation relatively to each other, these alterations of state are referred (principle of relativity).}}

The equation sets forth that the energy of a body at rest ({{mvar|E}}) equals its mass ({{mvar|m}}) times the speed of light ({{mvar|c}}) squared, or {{math|''E''&nbsp;{{=}}&nbsp;''mc''<sup>2</sup>}}.

{{quote|If a body gives off the energy {{mvar|L}} in the form of radiation, its mass diminishes by {{math|''L''/''c''<sup>2</sup>}}. The fact that the energy withdrawn from the body becomes energy of radiation evidently makes no difference, so that we are led to the more general conclusion that

The mass of a body is a measure of its energy-content; if the energy changes by {{mvar|L}}, the mass changes in the same sense by {{math|''L''/(9 × 10<sup>20</sup>)}}, the energy being measured in [[Physics:Erg|erg]]s, and the mass in grammes.

...

If the theory corresponds to the facts, radiation conveys inertia between the emitting and absorbing bodies.}}

The mass-energy relation can be used to predict how much energy will be released or consumed by nuclear reactions; one simply measures the mass of all constituents and the mass of all the products and multiplies the difference between the two by {{math|''c''<sup>2</sup>}}. The result shows how much energy will be released or consumed, usually in the form of [[Physics:Electromagnetic radiation|light]] or heat. When applied to certain nuclear reactions, the equation shows that an extraordinarily large amount of energy will be released, millions of times as much as in the combustion of chemical explosives, where the amount of mass converted to energy is negligible. This explains why nuclear weapons and nuclear reactors produce such phenomenal amounts of energy, as they release [[Physics:Binding energy|binding energy]] during [[Physics:Nuclear fission|nuclear fission]] and [[Physics:Nuclear fusion|nuclear fusion]], and convert a portion of subatomic mass to energy.

==Commemoration==
The International Union of Pure and Applied Physics (IUPAP) resolved to commemorate the 100th year of the publication of Einstein's extensive work in 1905 as the World Year of Physics 2005. This was subsequently endorsed by the {{wipe|United Nations}}.

==References==
=== Citations ===
{{reflist|colwidth=30em}}

===Primary sources===
{{reflist|group=einstein|refs=
<ref name=einsta>
{{cite journal | last = Einstein | first = Albert |  title = Über einen die Erzeugung und Verwandlung des Lichtes betreffenden heuristischen Gesichtspunkt |trans-title=On a Heuristic Point of View about the Creation and Conversion of Light |language=de | journal = Annalen der Physik | volume = 17 | pages = 132–148 | year = 1905 | url = http://www.zbp.univie.ac.at/dokumente/einstein1.pdf | access-date = 2017-01-15|bibcode = 1905AnP...322..132E |doi = 10.1002/andp.19053220607 | issue = 6 | doi-access = free }}
:English translations:
:* {{cite web |last=Einstein |first=Albert |url=http://www.physik.fu-berlin.de/~kleinert/files/eins_lq.pdf |title=On a Heuristic Point of View about the Creation and Conversion of Light |translator=Dirk ter Haar |translator-link=Dirk ter Haar}}
:* {{cite web |last=Einstein |first=Albert |url=https://en.wikisource.org/?curid=59468 |title=On a Heuristic Point of View about the Creation and Conversion of Light |translator=Wikisource |translator-link=Wikisource}}</ref>

<ref name=einstb>
{{cite journal | last = Einstein | first = Albert |  title = Über die von der molekularkinetischen Theorie der Wärme geforderte Bewegung von in ruhenden Flüssigkeiten suspendierten Teilchen |trans-title=Investigations on the theory of Brownian Movement |language=de | journal = Annalen der Physik | volume = 322 | pages = 549–560 | year = 1905 | url = http://www.zbp.univie.ac.at/dokumente/einstein2.pdf | access-date = 2017-01-15 |bibcode = 1905AnP...322..549E |doi = 10.1002/andp.19053220806 | issue = 8 | doi-access = free }}
:English translation:
:*{{cite web |last=Einstein |first=Albert |url=http://users.physik.fu-berlin.de/~kleinert/files/eins_brownian.pdf |title=Investigations on the theory of Brownian Movement |translator=A. D. Cowper}}
</ref>

<ref name=einstc>
{{cite journal | last = Einstein | first = Albert |  title = Zur Elektrodynamik bewegter Körper |trans-title=On the Electrodynamics of Moving Bodies |language=de | journal = Annalen der Physik | volume = 17 | pages = 891–921 | date = 1905-06-30 | url = http://www.zbp.univie.ac.at/dokumente/einstein3.pdf | access-date = 2017-01-15 | bibcode = 1905AnP...322..891E |doi = 10.1002/andp.19053221004 | issue = 10 | doi-access = free }} See also a digitized version at Wikilivres:Zur Elektrodynamik bewegter Körper.
: English translations:
:* {{cite contribution |last=Einstein |first=Albert |chapter-url=http://www.fourmilab.ch/etexts/einstein/specrel/www/ |contribution=On the Electrodynamics of Moving Bodies |translator1=George Barker Jeffery |translator1-link=George Barker Jeffery |translator2=Wilfrid Perrett |translator2-link=Wilfrid Perrett |title=The Principle of Relativity |location=London |publisher=Methuen and Company, Ltd. |date=1923}}
:* {{cite contribution |last=Einstein |first=Albert |chapter-url=https://en.wikisource.org/wiki/On_the_Electrodynamics_of_Moving_Bodies |contribution=On the Electrodynamics of Moving Bodies |translator=Megh Nad Saha |translator-link=Megh Nad Saha |title=The Principle of Relativity: Original Papers by A. Einstein and H. Minkowski |publisher=University of Calcutta |date=1920 |pages=1–34}}</ref>

<ref name=einstd>
{{cite journal | last = Einstein | first = Albert |  title = Ist die Trägheit eines Körpers von seinem Energieinhalt abhängig? |trans-title=Does the Inertia of a Body Depend Upon Its Energy Content? |language=de | journal = Annalen der Physik | volume = 18 | pages = 639–641 | year = 1905 | url = http://www.zbp.univie.ac.at/dokumente/einstein4.pdf | access-date = 2017-01-15 |bibcode = 1905AnP...323..639E |doi = 10.1002/andp.19053231314 | issue = 13 | doi-access = free }}
: English translations:
:* {{cite contribution |last=Einstein |first=Albert |chapter-url=http://www.fourmilab.ch/etexts/einstein/E_mc2/www/ |contribution=Does the Inertia of a Body Depend Upon Its Energy Content? |translator1=George Barker Jeffery |translator2=Wilfrid Perrett |title=The Principle of Relativity |location=London |publisher=Methuen and Company, Ltd |date=1923}}</ref>}}

===Secondary sources===
* [[Biography:John Gribbin|Gribbin, John]], and Gribbin, Mary. ''Annus Mirabilis: 1905, Albert Einstein, and the Theory of Relativity'', Chamberlain Bros., 2005. {{ISBN|1-59609-144-4}}. (Includes DVD.)
* Renn, Jürgen, and Dieter Hoffmann, "1905—a miraculous year". 2005 ''J. Phys. B: At. Mol. Opt. Phys.'' 38 S437-S448 (Max Planck Institute for the History of Science) [Issue 9 (14 May 2005)]. {{doi|10.1088/0953-4075/38/9/001}}.
* Stachel, John, et al., ''Einstein's Miraculous Year''. Princeton University Press, 1998. {{ISBN|0-691-05938-1}}.

==External links==
* [http://users.physik.fu-berlin.de/~kleinert/files/ Collection of the ''Annus Mirabilis'' papers and their English translations]

{{Einstein}}

[[Category:Historical physics publications]]
[[Category:Physics papers]]

{{Sourceattribution|Annus Mirabilis papers|1}}