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: Tennis ball diffraction angles

  1. Dec 6, 2007 #1
    1. The problem statement, all variables and given/known data
    Quantum effects are negligible in "macroscopic" world.
    Show than on example.
    A tennis ball with speed 0.5 m/s is thrown thru a window.
    Dimensions of a window are 1*1.5 m.
    Calculate vertical and horizontal diffraction angles.



    2. Relevant equations
    [tex]\lambda[/tex]=h/p
    dSin[tex]\alpha[/tex]=n[tex]\lambda[/tex]


    3. The attempt at a solution
    For horizontal diffraction angle.
    [tex]\lambda[/tex]=h/mv=h/m*0.5

    I assumed that n=1.
    so

    dSin[tex]\alpha[/tex]=n[tex]\lambda[/tex]=h/m*0.5

    [tex]\alpha[/tex]=ArcSin(h/m*0.5*d)=ArcSin(h/m*0.5*1)

    from this I would conclude thath, alpha is negligible small, that is
    quantum effect are negligible.
    I would do the same thing for vertical angle.
    I' not shure if I'm right ?
     
  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