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2Physics Quote:
"Many of the molecules found by ROSINA DFMS in the coma of comet 67P are compatible with the idea that comets delivered key molecules for prebiotic chemistry throughout the solar system and in particular to the early Earth increasing drastically the concentration of life-related chemicals by impact on a closed water body. The fact that glycine was most probably formed on dust grains in the presolar stage also makes these molecules somehow universal, which means that what happened in the solar system could probably happen elsewhere in the Universe."
-- Kathrin Altwegg and the ROSINA Team

(Read Full Article: "Glycine, an Amino Acid and Other Prebiotic Molecules in Comet 67P/Churyumov-Gerasimenko"

Thursday, February 10, 2005

Physics: from Electron to Universe

... and what about your cellphone or the large TV in your living room?

In 1897 .. when J. J. Thompson conclusively discovered electrons,
many might have wondered what could be the use of learning about
such small particles ... a few millions of which can be accomodated
on the tip of a needle.
[Electron's 'classical' radius is about 2.8 X 10^(-15) meter
which means you need to divide 2.8 meters by 1 million billion.
Why 'classical?' - Be patient. We'll explain that later]

But within a few decades the world got revolutionized mainly with
the use of electricity (which is nothing but flow of electrons in wires)
and the great discovery of semiconductors in which energy of electron
is controlled in such a way that the device can be assigned to do
various kinds of logical operation and used to make wonderful
things ... like radio, T.V, telephone .... computer .... microwave oven..
Our modern day life is so much dependent on electrons that we
almost forget that these is being put to work day and night like slaves
by our technology experts for helping us to communicate and do
important jobs and provide us comfort!

Electron is a true revolution in mankind's history.
Alas! We never celebrate it!


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