Group: sci.physics.particle
From: =?UTF-8?Q?Jeff=E2=96=B2Relf?=
Date: Saturday, February 23, 2008 11:10 PM
Subject: How much energy was used to produce ( and maintain ) this vacuum ?

If the fields of the photon are in a near perfect vacuum,
how much energy was used to produce ( and maintain ) this vacuum ?

Empirically, there are no error bars
to your ( ahem ) metaphysical statement: “ Light has no mass. ”;
100 years form now, the error bars might be reduced.