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Can Anyone Help?

  1. Jun 9, 2006 #1
    Okay so I have this question....

    A photon of gamma radiation emitted by the radioactive decay of technetium-99 has an energy of 3.85 MeV. This radiation has a wavelength of

    a) 5.17x10^-26m
    b) 3.23x10^-13m
    c) 3.10x10^12m
    d) 9.29x10^20m

    Can anyone explain it...no idea how to even start it!!!:confused:
     
  2. jcsd
  3. Jun 9, 2006 #2

    Gokul43201

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    Turn to the page on your text that first talks about energy and wavelength relationships for EM waves. Tell us what you find and how you plan to proceed.

    We can't help you unless you help yourself. Please read the guidelines for posting in this forum.
     
  4. Jun 9, 2006 #3
    I figure....that it has something to do with
    E= hc/T
     
  5. Jun 10, 2006 #4

    Gokul43201

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    That's a start.

    What do the various symbols in that equation represent?

    And secondly what have you learned about units when it comes to solving equations?
     
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