Subject: Subject: Red Shift and Planck's equation

Subject: Red Shift and Planck's equation  
As a Astronomy grad of almost thirty years ago, but still very much 
interested, this one has puzzled me for some time:
When we observe a distant galaxy, we see specific
characteristic spectral emissions 'red-shifted'. I assume the photons
are emmitted at their original characteristic frequency as would be 
seen from a stationary source, say here on earth, i.e. 'further blue' 
than photons from distant galaxies. Since the energy of a photon is 
determined by Planck's constant multiplied by the frequency, 
what happens to the energy loss in the drop of frequency???
Alan J. Maloney 

Re:Subject: Red Shift and Planck's equation