Register to reply

Heisenberg's uncertainty principle, find uncertainty in position

by Glissando
Tags: heisenberg, position, principle, uncertainty
Share this thread:
Sep30-11, 11:39 PM
P: 34
1. The problem statement, all variables and given/known data
Using Heisenberg's uncertainty principle, calculate the uncertainty in the position of a proton moving at a speed of (5.000.01) x 10^4 m/s.

2. Relevant equations
Δx[itex]\geq[/itex] [itex]\frac{h}{4mΔv\pi}[/itex]

3. The attempt at a solution
x[itex]\geq[/itex] (6.626*10^-34)/(4pi(1.6726*10^-24)(50.01 * 10^4)

I get how to solve it, I just don't really understand what to do with the 0.01. I'm assuming it's in meters, so I have to do 0.01/5 and then multiply that by 5*10^4, but I'm supposed to be getting 3*10^-10

Thanks in advance (:
Phys.Org News Partner Science news on
Wildfires and other burns play bigger role in climate change, professor finds
SR Labs research to expose BadUSB next week in Vegas
New study advances 'DNA revolution,' tells butterflies' evolutionary history
Oct1-11, 05:09 AM
P: 111
The formula says [itex]\Delta x=\frac{h}{4\pi m\Delta v}[/itex]
What is [itex]\Delta v[/itex]? Is it a relative or an absolute uncertainty?

Register to reply

Related Discussions
Heisenberg's Momentum-Position Uncertainty Principle Advanced Physics Homework 10
Heisenberg's Momentum-Position Uncertainty Principle Advanced Physics Homework 1
Uncertainty principle, relating the uncertainty in position to the uncertainty Advanced Physics Homework 3
Determining Uncertainty in Position using Heinsburg's Uncertainty Principle Introductory Physics Homework 1
Heisenberg Uncertainty Principle Quantum Physics 12