This video looks at the pioneering work of Niels Bohr who proposed a novel model of the atom in 1913 which would lay the foundations for a quantum mechanical treatment ten years later. After discussing the limitations of Thomson's Plum Pudding model and Rutherford's Nuclear model, Bohr's quantum model is discussed as a union between classical ideas of electrostatics and angular momentum quantisation. The radii and energies of the allowed electron orbits for the Hydrogen atom are calculated, along with the visible emission spectrum. The video ends with a brief discussion of Bohr's influence on the development of quantum physics. References: Quantum physics of atoms, molecules, solids, nuclei and particles - Eisberg and Resnick Introduction to Quantum Mechanics - Griffiths and Schroeter Introduction to Quantum Mechanics - Phillips The Quantum Story - Jim Baggot Quantum Physics for Dummies - Steven Holzner Thirty Years that Shook Physics - Gamow Inward Bound - Abraham Pais You can help support this channel via the Physics Explained Patreon account: https://www.patreon.com/physicsexplained You can follow me on instagram: https://www.instagram.com/physics_explained_ig You can follow me on Twitter: https://twitter.com/PhysicsExplain1