# Google Features Neil Bohr's 127th Birthday

Google Doodle for this day October 07 2012, featuring 127th birthday of Neil Bohr. Its been awhile since Google put a doodle on its homepage. I remember last it was  September 27 2012 that featured its 14th Birthday -- Yes Google's 14th Birthday.
With the technology, Physics and Chemistry had impact to this world. Without this subject then it is very hard to make a device that does not deal with the calculations of Physics and Chemistry.

Google features Neil Bohr with a design of Vintage Google with Atom in the first letter O of the word Google and it has a formula E-V($h\nu = \epsilon_{2} - \epsilon_{1}\,$).

It was October 7, 1885, when Neil Bohr was born -- Neils Hendrik David Bohr  -- who made contributions to the world of science particularly in understanding the Atomic Structure and Quantum Mechanics.

Neil Bohr was a Danish physicist who received Nobel Prize in Physics in 1922 and Franklin Medal ( solar and engineering award presented by the Franklin Institute, of Philadelphia, PA, USA.) in 1926.

Bohr knows as for

• Copenhagen interpretation
• Complementarity
• Bohr model
• Sommerfeld–Bohr theory
• BKS theory
• Bohr-Einstein debates
• Bohr magneton
Contributions to physics and chemistry
• The Bohr model of the atom, the theory that electrons travel in discrete orbits around the atom's nucleus.
• Identified the isotope of uranium that was responsible for slow-neutron fission – 235U.
• Principle of complementarity: that items could be separately analyzed as having several contradictory properties.
• The shell model of the atom, where the chemical properties of an element are determined by the electrons in the outermost orbit.
• Correspondence principle, the basic tool of Old quantum theory.
• Liquid Drop Model of the atomic nucleus.
Neil Bohr Atomic Model

 Image Courtesy From https://the-history-of-the-atom.wikispaces.com/

LEGACY
• He was one of the founding fathers of CERN in 1954.
• Received the first ever Atoms for Peace Award in 1957.
• In 1965, three years after Bohr's death, the Institute of Physics at the University of Copenhagen changed its name to the Niels Bohr Institute.
• The Bohr models semicentennial was commemorated in Denmark on 21 November 1963 with a postage stamp depicting Bohr, thehydrogen atom and the formula for the difference of any two hydrogen energy levels: .
• Bohrium (a chemical element, atomic number 107) is named in honour of Bohr.
• Hafnium, another chemical element, whose properties were predicted by Bohr, was named by him after Hafnia, Copenhagen's Latin name.
• Asteroid 3948 Bohr is named after him.
• The Centennial of Bohr's birth was commemorated in Denmark on 3 October 1985 with a postage stamp depicting Bohr with his wife Margrethe.
• In 1997 the Danish National Bank started circulating the 500-krone banknote with the portrait of Bohr smoking a pipe.[48]

Sources: http://en.wikipedia.org/wiki/Niels_Bohr
http://en.wikipedia.org/wiki/Franklin_Medal http://www.nobelprize.org/nobel_prizes/physics/laureates/1922/