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Homework Help: How to find the wavelength of a particle with mass?

  1. Apr 15, 2012 #1
    1. The problem statement, all variables and given/known data

    Does the following question ask what my title says? I study pack says "How to find the wavelength of a particle with mass?" So, is the following question good?

    Question: What is the deBroglie wavelength of an electrion with a speed of 2.2x10^6 m/s

    Answer I got: First, calculate the momentum, P=MV
    (9.11x10^-31)(2.2x10^6m/s) = 2x10^-24

    So... Wavelength = h/p = 6.62x10^34/2x10^-24

    = 3.33x10^-10

    Is this correct guys? Thanks!

    2. Relevant equations

    3. The attempt at a solution
  2. jcsd
  3. Apr 15, 2012 #2


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    Homework Helper

    The method is good - I assume you calculated correctly at each step. That answer is certainly a typical size.
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