Re: Lord D'Arcy and steam elevators

In article <Iy3AAr.Gv4@xxxxxxxxxxx>, Wilson Heydt <whheydt@xxxxxxxxxxx> wrote:
In article <9sJ0UAf1w-B@xxxxxxxxxxxxxxxxx>,
Kai Henningsen <kaih=9sJ0UAf1w-B@xxxxxxxxxxxxxxxxx> wrote:
spam@xxxxxxxxxxxxxxxxxxxx (Jonathan L Cunningham) wrote on 18.04.06 in <1he03o8.126dv6jncqch2N%spam@xxxxxxxxxxxxxxxxxxxx>:

Of course, a hole in a vacuum, where an electron is missing,
is called a positron ... Dirac invented them, IIRC. You'd
think a hole would have negative mass - but apparently not.

Not quite.

Positrons are the antimatter equivalent to electrons; they aren't holes,
but quite normal particles - same mass, opposite charge, as with any
antimatter particles. Add one positron and one electron, and get a flash
(two photons).

If the positron's a hole, why not the electron? Doesn't make sense.

Plus, a positron, just like an electron, is a combination of quarks - I
forget which ones.

So far as I know, leptons are elementary particles. It's the
various muon and baryons that are composed of quarks held together
^^^^
by gluons.

Correcting my own mistake. That should be "mesons".

--
Hal Heydt
Albany, CA

My dime, my opinions.
.

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