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: Problem relating to the Heisenberg's Principle

  1. Mar 25, 2010 #1
    1. The problem statement, all variables and given/known data
    An electron is placed in a box about the size of an atom that is about 1*10^-10m. What is the velocity of the electron?


    2. Relevant equations
    Heisenberg's equation
    xp=h/2pi
    xmv=h/2pi
    v=h/2pi*x*m
    where x=1*10^-10m
    m=9.1*10^-31kg
    h=planck's cosntant


    3. The attempt at a solution

    Answer is 7.29*10^6
     
  2. jcsd
  3. Mar 25, 2010 #2
    Was this REALLY the question? The uncertainty principle states that:

    [tex] \Delta x \Delta p \geq \frac {h} { 4 \pi} [/tex]

    NOT

    [tex] x p = \frac {h} { 4 \pi} [/tex]


    (I don't know how to do the reduced planck's constant in Latex)
     
  4. Mar 27, 2010 #3
    So it's 4pi not 2pi? Actually the answer I'm getting is different from that which is given at the end of my physics book.
    And while solving the problem, doesn't it become [tex]\Delta[/tex]x[tex]\Delta[/tex]p=h/4pi?
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook




Loading...
Similar Threads for Problem relating Heisenberg's Date
Special Relativity problem Apr 4, 2018
Problem related to the Bernoulli Equation Mar 21, 2018
Solution of basic special relativity problem Feb 26, 2018
Galilean Relativity Problem Feb 6, 2018
Small Relativity Problem Jan 26, 2018