RE: blue flash and criticality

[Dave Brown <david.brown@nist.gov>]

>My question now is, IF, you had a camera, and the source of criticality 
>was shielded from the camera's angle, in other words that the source was 
>going away from the camera instead of at it, and you you were able to 
>establish the original spectrum from long distance face on photography, 
>would it be red shifted going away?

....from my limited understanding of Cherenkov radiation I believe the 
answer to your question to be..No.  Cherenkov light is not the result of a 
doppler shift in the emitted light of the particle as your question 
infers.  It is a Secondary result of the phenomenon associated with the 
speed of the particles in the given medium, with a characteristic 
wavelength.  I like the analogy of the sonic boom.... though I'm not sure I 
could explain the phenomenology associated with it.

Regards,
Dave Brown
david.brown@nist.gov

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