> ... the only thing left to change to fix the equation is mu, but mu is the > frequency. So mu (the frequency, aka 1/wavelength, aka redshift) decreases > when the observer travels away from the source of light ... Which is puzzling :-) ie your explanation explained what MUST happen if the assumptions are correct BUT it still isn't intuitive to dwellers in Newtonian space. RM -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body