Print ViewSimultaneous Measurements of Position and Velocity

by Sasa888
Tags: measurements, position, print, velocity, viewsimultaneous
Sasa888 is offline
Nov22-08, 09:43 AM
P: 4
1. The problem statement, all variables and given/known data

The x coordinate of an electron is measured with an uncertainty of 0.200 mm. What is v_x, the x component of the electron's velocity, if the minimum percentage uncertainty in a simultaneous measurement of v_x is 1.00 %? Use the following expression for the uncertainty principle:

(Delta x * Delta p_x )> or = h/2pi,

where Delta x is the uncertainty in the x coordinate of a particle, Delta p_x is the particle's uncertainty in the x component of momentum, and where h is Planck's constant.

My attempt:

delta p_x = h/(2pi*delta x)

delta p_x=m* delta v_x ??

i dnt know if i am allowed to do this.. also if it is allowed i dont know what to do next..
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borgwal is offline
Nov22-08, 11:44 AM
P: 370
So far so good! Now the other thing you have been given is that delta v_x is 1% of v_x.
Sasa888 is offline
Nov22-08, 12:24 PM
P: 4
Ok im gonna try it
Thanks a lot!

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