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From: jheimann@BBNCCY.ARPA
Newsgroups: net.physics
Subject: Limit to photon frequency
Message-ID: <275@sri-arpa.ARPA>
Date: Fri, 14-Jun-85 13:16:23 EDT
Article-I.D.: sri-arpa.275
Posted: Fri Jun 14 13:16:23 1985
Date-Received: Mon, 17-Jun-85 04:07:15 EDT
Lines: 8

From:  John H. Heimann <jheimann@BBNCCY.ARPA>

	All the discussion of limits to photon energy is predicated on the
assumption that the limiting factor is gravity.  Wouldn't very energetic
photons tend to lose energy through pair-production long before they could
swallow themselves gravitationally?  

						John