1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Calculate the orbital period

  1. Mar 2, 2012 #1
    1)Use the bohr model, calculate the orbital period in eachlevel(n=1,2,3)

    2) the average lifetime of the first excited level of a hydrogen atom is 1.0 10^-8 s. In the bohr model, how many orbits does an electron in the n=2 level complete before returning to the ground level?

    2. Relevant equations

    E(n) = -13.60/(n^2) (1)
    λ = hc/(E(2)-E(1)) (2)
    f = c/λ (3)
    f = (E(1)-E(2))/h (4)
    T = 1/f (5)
    h = 6.626*10^-31 J*s
    r(n) = ε(n^2*h^2)/(π*m*e^2) (6)
    m=9.109*10^-19 kg
    ε(0) = 8.85 * 10^-12 C^2/N*m^2
    e = 1.60*10^-19 C

    3. The attempt at a solution

    After i have numerically inserted the values in the equations (4),(1) and (5) i got i to be
    3.42*10^-16 s, 3.2466*10^-16s and 4.10*10^-16 is that correct ?

    In 2) should i calculate circumference to begin with ?
  2. jcsd
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Can you offer guidance or do you also need help?
Draft saved Draft deleted