Albert einstein

Albert Einstein was born in Ulm, in the Kingdom of Württemberg in the German Empire on 14 March 1879.
The Einsteins were non-observant Jews. Albert attended a Catholic elementary school from the ageof five for three years. Later, at the age of eight, Einstein was transferred to the Luitpold Gymnasium where he received advanced primary and secondary school education
Theory of relativity and E =mc2
Einstein's "Zur Elektrodynamik bewegter Körper" ("On the Electrodynamics of Moving Bodies") was received on 30 June 1905 and published 26 September of that same year. It reconciles Maxwell'sequations for electricity and magnetism with the laws of mechanics, by introducing major changes to mechanics close to the speed of light. This later became known as Einstein's special theory ofrelativity.
Consequences of this include the time-space frame of a moving body slowing down and contracting (in the direction of motion) relative to the frame of the observer. This paper also argued that theidea of a luminiferous aether – one of the leading theoretical entities in physics at the time – was superfluous.[63]
In his paper on mass–energy equivalence Einstein produced E = mc2 from hisspecial relativity equations.[64] Einstein's 1905 work on relativity remained controversial for many years, but was accepted by leading physicists, starting with Max Planck.[65][66]
Photons and energyquanta
In a 1905 paper, Einstein postulated that light itself consists of localized particles (quanta). Einstein's light quanta were nearly universally rejected by all physicists, including Max Planckand Niels Bohr. This idea only became universally accepted in 1919, with Robert Millikan's detailed experiments on the photoelectric effect, and with the measurement of Compton scattering.
Einsteinconcluded that each wave of frequency f is associated with a collection of photons with energy hf each, where h is Planck's constant. He does not say much more, because he is not sure how the...