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Homework Help: Find the KE of the following particles that each have a de Broglie wavelength of

  1. Oct 9, 2011 #1
    Find the kinetic energy of the following particles that each have a de Broglie wavelength of 0.50 nm.?

    (a) photons
    ____eV = 2480eV
    (b) electrons
    ____eV
    (c) neutrons
    ____eV
    (d) α particles
    ____eV

    i know E= hc/wavelength which = a and after that im stuck i know that the wavelength = h/p but i dont know how to solve the others with this
     
  2. jcsd
  3. Oct 9, 2011 #2
    Re: Find the KE of the following particles that each have a de Broglie wavelength of

    i found be by taking hc/ lamda squared and dividing it by the momemtum squared
     
  4. Oct 9, 2011 #3
    Re: Find the KE of the following particles that each have a de Broglie wavelength of

    momentum p,
    p = h/[itex]\lambda[/itex]

    total energy E :
    E[itex]^{2}[/itex] = p[itex]^{2}[/itex]c[itex]^{2}[/itex] + m[itex]_{o}[/itex] [itex]^{2}[/itex]c[itex]^{4}[/itex]

    KE = E - m[itex]_{o}[/itex]c[itex]^{2}[/itex]
     
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