- 1905 is known as Einstein's "annus mirabilis" or "miracle year," during which he published four seminal papers. - These papers were on the photoelectric effect (introducing the concept of light quanta), Brownian motion (providing evidence for the existence of atoms and molecules), special relativity (revolutionizing concepts of space, time, and motion), and mass-energy equivalence (E=mc²). - Therefore, he made significant discoveries in all three areas listed: Photoelectric effect, Brownian motion, and Special theory of relativity.
In 1905, Albert Einstein discovered
Asked in TNPSC CS Prelims 2014 · Topic: Scientists & Inventions (Einstein's Theories of Relativity and Photoelectric Effect)
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Answer: D. Photoelectric effect, special theory relativity and Brownian motion
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