Eric
Photons are never at rest as far as I know. They do carry momentum and when
they interact impart momentum to rest mass items. In addition neutrinos are
thought to have some mass and they are never at rest as far as I know.
Bob
----- Original Message -----
From: Eric Walker
To: vortex-l@eskimo.com
Sent: Tuesday, February 03, 2015 8:42 PM
Subject: Re: [Vo]:vortex mass
On Tue, Feb 3, 2015 at 7:54 AM, David Roberson <dlrober...@aol.com> wrote:
It would have been a surprise to find that nanovortices did not have mass
since they obviously have energy.
Mass is a tricky thing. Photons have no rest mass, for example, even though
they can carry as much energy as you can put into them. But they do follow the
contours of spacetime, almost as if they had mass. (I wonder, here, whether
physicists have gotten themselves into another language game with this one.)
Eric
