April and May Historical Events In Spectroscopy
by Leopold May, Catholic University
- April 1, 1972 Julian Stone reported in Applied Physics Letters
on new type of fiber made of quartz & filled with tetrachloroethylene
that may be able to carry light.
- April 7, 1795 A new law established the metric decimal system
in France on this day.
- April 10, 1900 Arnold
O. Beckman who invented the Beckman DU Spectrophotometer
with Cary was born on this day. He founded Beckman Instruments
- April 13, 1872 - This is the birthday of Georges
Urbain who discovered the law of optimum phosphorescence
of binary systems with K. Auer von Weisbach.
- April 21, 1774 - The discoverer of optical activity, Jean-Bapiste
Biot, was born on this day.
- April 22, 1958 - Max
K. E. L. Planck, who was born on this day, introduced the
quantum theory in 1900. He received the Nobel Prize in Physics
- April 25, 1900 - Wolfgang
Pauli discovered the exclusion principle and received the
Nobel prize in Physics in 1945. He was born on this day.
- April 30, 1897 - On this day, Joseph
J. Thomson announced the discovery of the electron as a body
smaller than and a constituent of the atom.
- May 5, 1811 - John W. Draper, a pioneer in photography who
improved on Daguerre's process, was born on this day. He served
as the first president of the American
- May 6, 1859 - Julius
B. Cohen, born on this day, did research on optical activity.
- May 10, 1860 - Robert
Bunsen and Gustav
R. Kirchhoff announced the discovery of cesium using flame
spectroscopy on this day.
- May 17, 1836 - Joseph
N. Lockyer, who was born on this day, discovered helium in
the solar spectrum.
- May 24, 1686 - This is the birthday of Gabriel
D. Fahrenheit who improved thermometers by using mercury
in 1720 and invented the Fahrenheit temperature scale.
- May 25, 1865 - Pieter
Zeeman, who showed that magnetic fields split spectral lines,
was born on this day. He shared the Nobel Prize in Physics with
A. Lorentz in 1902.
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Last Modified: April 9, 1999