## BIG IDEA - 1905 was the *annus mirabilis* for physics (Miracle year) in which Albert Einstein published four papers. These papers explained the photoelectric effect, evidence of the atom, and the theories of relativity. ## Annus Mirabilis 2. Applied [[Max Planck|Max Planck's]] work the [[Photoelectric Effect|photoelectric effect]]. - established the energy of the light [[Quanta|quanta]], $E=hf$ 3. Calculated the probabilities of Brownian motion, thus deriving the size of the atom. 4. Proposed [[Special Relativity|Special]] and [[General Relativity]]. - spacetime - length contraction - time dilation - mass-energy equivalence - black holes --- Return [[Home|Home]] | [[Notes Vault/Physics Notes Vault/Physics Skills/Physics|Physics]] | [[Physicists]] | [[Astrophysics]]