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Estimate light, eletron, neutron beams energy

  1. Oct 27, 2011 #1
    1. The problem statement, all variables and given/known data
    estimate light, eletron, neutron beams energy to use 'order - of - magnitude'
    [eV]

    2. Relevant equations
    E = hv

    3. The attempt at a solution
    E = hv where h is plancks constant and v is frequency and E is energy
    6573 angstroms = 6.573 e-7 m = wavelength (λ)

    First we must use: v = c/λ where c is the speed of light
    v = (3.00 e8 m/s)/(6.573 e-7 m) = 4.564e14/s

    E = (6.63 e-34 J x s)(4.564 e14/s) = 3.026 e-19 J





    I dont know how can i solve it
    how can i calculate el, neu?
     
  2. jcsd
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