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Solar Sail/ Mirror Redshift & Blueshift

  1. Dec 23, 2015 #1
    Hi all,

    I was hoping you could help me out with this one.

    Im trying to calculate the redshift or blueshift of a photon that strikes a mirror and reflects.

    I know E=pc, and that 2p is the momentum transfer. I also know that kinetic energy is 2p/M (of the mirror).
    However, this says that red/blushift isnt dependent on mirror velocity. Surely thats not right?!? If the mirror is moving faster towards the oncoming light, surely the blueshift is greater.

    Please clarify
  2. jcsd
  3. Dec 23, 2015 #2
    I got it, it's Doppler shift. Never mind
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