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I know we have been warned not to respond to these screeds, but the logic incut
this one is so faulty that it doesn't even work with ordinary phenomena like
sound waves. The reason the pitch decreases (or wavelength increases) for
the sound of a car horn (when the car is moving away from the listener) is
because the same number of wavelengths emitted when the car is at rest now
cover a longer distance because of the motion of the car during the time the
waves are emitted. There is no appeal to a change in the speed of sound to
explain the phenomena - just as there is no need to appeal to a change in
the speed of light in the case of the rocket.
I promise I won't say anything further.
Bob at PC
-----Original Message-----Behalf
From: Forum for Physics Educators [mailto:PHYS-L@list1.ucc.nau.edu] On
Of Pentcho Valev
Sent: Thursday, October 28, 2004 7:13 AM
To: PHYS-L@LISTS.NAU.EDU
Subject: How students can test relativity
By resolving the following problem. A light source at the top of a tower
with height h emits light and this light reaches a receiver on the ground
with a speed (as judged by the receiver): A) c ; B) c+v, v>0