Everything about The Elementary Charge totally explained
The
elementary charge, e, is the
electric charge carried by a single
proton, or equivalently, the negative of the
electric charge carried by a single
electron.
This is a fundamental
physical constant and the
unit of
electric charge in the system of
atomic units as well as some other systems of
natural units.
It has a measured value of approximately, according to the
NIST posted
CODATA value for e
. See the 2006 Committee on Data for Science and Technology (CODATA) list of physical constants:
CODATA report, TABLE XLVIII for uncertainty in
e. In the
centimetre gram second system of units, the value is
statcoulombs}}.
Since it was first measured in
Robert Millikan's famous
oil-drop experiment in 1909, the elementary charge has been considered indivisible.
Quarks, first posited in the 1960s, have fractional electric charges (in units of
e and
e so that now the term
elementary charge referring to the charge on an electron is no longer strictly correct; this is irrelevant, however, in practical terms, since quarks are not detected except in groupings that have charges that are integer multiples of e. In
1982 Robert Laughlin tried to explain the fractional
quantum Hall effect by predicting the existence of fractionally charged
quasiparticles. In
1995, the fractional charge of Laughlin quasiparticles was measured directly in a quantum antidot electrometer at
Stony Brook University,
New York. In 1997, two groups of physicists at the
Weizmann Institute of Science in
Rehovot,
Israel, and at the
Commissariat à l'énergie atomique laboratory near
Paris, claimed to have detected such quasiparticles carrying an
electric current.
Further Information
Get more info on 'Elementary Charge'.
|
External Link Exchanges
Do you know how hard it is to get a link from a large encyclopaedia? Well we're different and will prove it. To get a link from us just add the following HTML to your site on a relevant page:
<a href="http://elementary_charge.totallyexplained.com">Elementary charge Totally Explained</a>
Then simply click through this link from your web page. Our crawlers will verify your link, extract the title of your web page and instantly add a link back to it. If you like you can remove the words Totally Explained and embed the link in article text.
As long as your link remains in place, we'll keep our link to you right here. Please play fair - our crawlers are watching. Your site must be closely related to this one's topic. Any kind of spamming, dubious practises or removing the link will result in your link from us being dropped and, potentially, your whole site being banned. |
