Notices
Results 1 to 1 of 1

Thread: Time dilation and absorption lines

  1. #1 Time dilation and absorption lines 
    Forum Bachelors Degree PetTastic's Avatar
    Join Date
    Jul 2010
    Location
    London UK
    Posts
    421
    My understanding of how the luminosity distance is calculated is that time dilation is assumed to slow the rate photons are emitted. (from our view point)

    Does the same apply to absorption lines at high z?
    Does hydrogen in distant clouds absorb photons slower than nearby clouds, if the wavelength hits an absorption line?

    I was looking at "Distant Galaxies Provide Timeline for Universe's Early Days | Distant Galaxies, Big Bang & Cosmology | ESO Very Large Telescope | Space.com"
    The hydrogen alpha lines are progressivly redshifted as they travel and being swept across several strong absorption lines before they reach us,
    and was just wondering what effect time dilation had.


    I believe in nothing, but trust gravity to hold me down and the electromagnetic force to stop me falling through
    Physics is the search for the best model not the truth, as only mythical beings know that.
    Reply With Quote  
     

  2.  
     

Similar Threads

  1. Time dilation
    By Ladez in forum Astronomy & Cosmology
    Replies: 5
    Last Post: August 18th, 2011, 07:32 AM
  2. Replies: 2
    Last Post: February 4th, 2008, 06:50 PM
  3. Time-Dilation
    By EV33 in forum Physics
    Replies: 19
    Last Post: February 2nd, 2008, 06:50 PM
  4. time dilation
    By Kabooom in forum Physics
    Replies: 0
    Last Post: December 25th, 2006, 01:34 AM
  5. TIME DILATION
    By Tommy4711 in forum Physics
    Replies: 20
    Last Post: June 9th, 2005, 03:39 PM
Bookmarks
Bookmarks
Posting Permissions
  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •