Aintelqa.133
net.space
utzoo!decvax!ucbvax!C70:sri-unix!hplabs!intelqa!murray
Mon Mar  8 12:26:53 1982
quasar redshifts
	    What would be the effect of a beam of light making a close
    approach to a black hole? Obviously, the light would be bent, but what
    affect would the transition have on the lights wavelength outside
    of the gravity well?

					    murray at intelqa

    From: Robert Elton Maas <REM at MIT-MC>

    Assuming no particle event happens (such as absorbption and
    re-radiation from an electron), the light is blueshifted
    as it enters and redshifted as it leaves, to end up with
    exactly the same wavelength as it started with at the same distance.
    If the blackhole is moving it's possible some net momemtum transfer might
    occur, creating a net redshift or blueshift. ES might know better.

	Assuming the black hole is spinning or otherwise in motion, would
this lend some credence to Arp's theory of close quasers? For example:

Light leaves a nearby ( but hidden from direct view) quaser, bends around
a black hole and is redshifted in the process. The light then proceeds
into some astronomers telescope where he declares that quasar is
X light years away because its light is redshifted by a factor of Y.

Admittedly, this theory is full of holes (in particular, where are
the blue-shifted quasars) but it does seem to answer the question
as to how you can have nearby redshifted quasars. Comments,
speculation?

					murray at intelqa