Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Factor physics question

  1. Oct 10, 2005 #1
    for the following question:
    show that the thickness x of an absorber required to reduce the intensity of radiation by a factor of 2 is given by x=0.693/(miu)

    my problem:
    what is meant by "a factor of 2"?
  2. jcsd
  3. Oct 10, 2005 #2


    User Avatar
    Science Advisor
    Homework Helper

    It means that the energy is reduced to one half its starting value. BTW - 0.693 looks suspiciously close to [itex]\ln 2[/itex]. ;)
  4. Oct 10, 2005 #3
    thanks!!! :)
    so usually, factor=mutiple?
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook