Uncertainty principle, Physics

Uncertainty principle (W. Heisenberg; 1927):

A principle, central to quantum mechanics, that states two complementary parameters (such as position & momentum, energy & time, or angular momentum & displacement) cannot both be known to infinite accuracy; the more you know regarding one, the less you know regarding the other.

It can be reveled in a quite clear way as it associate to position vs. momentum: To see something (let's say an electron), we ought to fire photons at it; they bounce off and come back to us, thus we can "see" it. If you select low-frequency photons, along a low energy, they do not pass on much momentum to the electron; however they give you a very fuzzy picture, thus you have a higher uncertainty in situation so that you can contain a higher certainty in momentum. Conversely, if you were to fire extremely high-energy photons (x-rays or gammas) at the electron, they would provide you a very apparent picture of where the electron is (higher certainty in position), however would impart great deal of momentum to the electron (higher uncertainty in momentum).

In a more general sense, the uncertainty principle tells us that the action of observing changes the observed in fundamental way.

Posted Date: 3/29/2013 2:25:06 AM | Location : United States







Related Discussions:- Uncertainty principle, Assignment Help, Ask Question on Uncertainty principle, Get Answer, Expert's Help, Uncertainty principle Discussions

Write discussion on Uncertainty principle
Your posts are moderated
Related Questions
X-rays was discovered by scientist Rontgen that's why they are also known as Rontgen pulses. Rontgen discovered that when pressure inside a discharge tube kept 10 -3 mm of Hg a

obtain expression for potential at point due to uniformly chargeddisc

Grandfather paradox: A paradox proposed to discount time travel & revel why it violates causality. Say that your grandfather constructs a time machine. Currently, you employ h

Explain the Merits of Vacuum Diode over Semiconductor Diode (i)  Vacuum Diodes can withstand high reverse voltages (ii)  Vacuum Diodes can operate at fairly high temperature

Where is the magnetic field because of a bar magnet strongest? Answer: This is just an experimental reality.

Q. Collector current I c =20 mA and base current I b = 50 A. Find current gain β of a transistor. β = I C / I B = 20 X 10 -3 / 50 X 10 -6 = 400

what should be the length of a nichrome wire of resistance 45 ohms if the length of a similar wire is 60 cm and resistance is 25 ohms

to demonstrate the electrostatic shielding

What is an optical port? In the fiber optics industry, optical port is the component that physically produces the connection or interface in between the harness and the illumin