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Test tomorrow ! - nuclear physics question

  1. Nov 19, 2009 #1
    1. The problem statement, all variables and given/known data
    hey, 2 questions thanks:
    1.A gamma ray is converted to an electron and a positron. If 50% of the gamma ray energy becomes kinetic energy, what is the wavelength of the gamma ray?

    2.A nucleus of a radioactive element (mass 10^-25) loses 10^-26g during gamma decay. if the gamma ray has a wavelength of 10^-14m, what is the recoil velocity of the nucleus?


    2. Relevant equations
    no idea, we havent learnt about wavelength at all.. however these two questions were in a big revision booklet so id rather be safe than sorry.


    3. The attempt at a solution

    thanks.
     
  2. jcsd
  3. Nov 19, 2009 #2
    You looks like you are just throwing question insincerely to board us to answer. Try to write more carful next time. If you show your attempt, I will tell you the answer. And If you haven't learn it, don't worry. You will be perfectly safe.
     
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