After reaching the lowest point of life at the age of 23 in 1902, with no job in hand, father going bankrupt, unable to marry girlfriend due to family pressure; Albert Einstein got a job in Swiss patent office in Bern, Switzarland. He quickly mastered the job, leaving him time to ponder on the transmission of electrical signals and electrical-mechanical synchronization, an interest he had been cultivating for several years. While at the school he had studied Scottish physicist James Maxwell’s electromagnetic theories which describe the nature of light, and discovered a fact unknown to Maxwell himself, that the speed of light remained constant. However, this violated Isaac Newton’s laws of motion because there is no absolute velocity in Newton’s theory. This insight led Einstein to formulate the principle of relativity.

In 1905—often called Einstein’s “miracle year”—he submitted a paper for his doctorate and had four papers published in the Annalen der Physik, one of the best known physics journals. The four papers—the photoelectric effect, Brownian motion, special relativity, and the equivalence of matter and energy—would alter the course of modern physics and bring him to the attention of the academic world. In his paper on matter and energy, Einstein deduced the well-known equation E=mc2, suggesting that tiny particles of matter could be converted into huge amounts of energy, foreshadowing the development of nuclear power.

At first, Einstein’s 1905 papers were ignored by the physics community. This began to change when he received the attention of Max Planck, perhaps the most influential physicist of his generation and founder of quantum theory. With Planck’s complimentary comments and his experiments that confirmed his theories, Einstein was invited to lecture at international meetings and he rose rapidly in the academic world. He was offered a series of positions at increasingly prestigious institutions, including the University of Zürich, the University of Prague, the Swiss Federal Institute of Technology, and finally the University of Berlin, where he served as director of the Kaiser Wilhelm Institute for Physics from 1913 to 1933.

Reference:

http://www.mapsofworld.com/on-this-day/november-21st-1894-the-japanese-win-the-battle-of-lushunkou

http://www.biography.com/people/albert-einstein-9285408#synopsis