The Naked Scientists

The Naked Scientists Forum

Author Topic: Red-shift of reflected light?  (Read 7027 times)

Offline Geezer

  • Neilep Level Member
  • ******
  • Posts: 8328
  • "Vive la résistance!"
    • View Profile
Re: Red-shift of reflected light?
« Reply #25 on: 29/04/2012 02:01:57 »
Presumably this is a consequence of energy conservation.

Something to do with density and wiggle rate?
 

Offline JP

  • Neilep Level Member
  • ******
  • Posts: 3366
  • Thanked: 2 times
    • View Profile
Re: Red-shift of reflected light?
« Reply #26 on: 29/04/2012 02:24:18 »
Yeah, that's one way of looking at it.  The frequency of the radiation doesn't change (or its photon energy would) but light moves slower and bunch closer together, so the energy density goes up, and as a consequence, the speed of its flow has to go down.
 

Offline Geezer

  • Neilep Level Member
  • ******
  • Posts: 8328
  • "Vive la résistance!"
    • View Profile
Re: Red-shift of reflected light?
« Reply #27 on: 29/04/2012 07:39:04 »
It seems you can't (easily) beat the oldies. If energy suddenly disappeared, it probably didn't.
 

The Naked Scientists Forum

Re: Red-shift of reflected light?
« Reply #27 on: 29/04/2012 07:39:04 »

 

SMF 2.0.10 | SMF © 2015, Simple Machines
SMFAds for Free Forums