BC may be correct - one is redshifted - one is blue shifted.
Bob at PC
________________________________________
From: phys-l-bounces@carnot.physics.buffalo.edu [phys-l-bounces@carnot.physics.buffalo.edu] On Behalf Of William Robertson [wrobert9@ix.netcom.com]
Sent: Friday, January 21, 2011 6:05 PM
To: Forum for Physics Educators
Subject: Re: [Phys-l] data ± model ± trust
In fourth grade?
Bill
On Jan 21, 2011, at 3:57 PM, Bernard Cleyet wrote: