Re: photons have no mass

Posted by dock on August 07, 2003 at 04:38:49:

In Reply to: Re: i have 2 pages... posted by DickT on August 05, 2003 at 09:14:38:

they have no mass at rest but are there photons at rest or their speed is always c?if their speed is always c and m=E/c^2 and E<>0 then is m=0?

what about frequency http://www.geocities.com/dr_physica/hz.htm
A?

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