On Feb 20, 7:21 pm, Jeff$B"%(BRelf wrote:
Did Einstein say a photon has proper mass ?
If so, where ? Did he venture to guess what it was ?

Here's a thought: spend a little less time ****ing with your worthless
hand-rolled client and breaking standards in your typical infuriating
and purposeful manner, and more time doing literature searches before
asking stupid questions.