History
The first evidence of quantized energy levels in atoms was the observation of spectral lines in light from the sun in the early 1800s by Joseph von Fraunhofer and William Hyde Wollaston. The theoretical explanation for energy levels was discovered in 1913 by Danish physicist Neils Bohr in the Bohr theory of the atom. The modern quantum mechanical theory, based on the Schrodinger equation, was advanced by Erwin Schrodinger and Werner Heisenberg in 1926.
Read more about this topic: Energy Level
Famous quotes containing the word history:
“A man will not need to study history to find out what is best for his own culture.”
—Henry David Thoreau (1817–1862)
“What would we not give for some great poem to read now, which would be in harmony with the scenery,—for if men read aright, methinks they would never read anything but poems. No history nor philosophy can supply their place.”
—Henry David Thoreau (1817–1862)
“America is, therefore the land of the future, where, in the ages that lie before us, the burden of the World’s history shall reveal itself. It is a land of desire for all those who are weary of the historical lumber-room of Old Europe.”
—Georg Wilhelm Friedrich Hegel (1770–1831)