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Question
what is uncertainty principle?

Answer
Hello fahad,

The uncertainty principle is a concept developed in the early years of the history of quantum mechanics. My simple statement of the principle is that there are some properties that cannot be know about an object if another property is known.

It is quite complex and these 2 Wikipedia sites do a better job that I could of explaining it.
http://simple.wikipedia.org/wiki/Uncertainty_principle
http://en.wikipedia.org/wiki/Uncertainty_principle

I hope this helps,
Steve

Physics

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Steve Johnson

Expertise

I would be delighted to help with questions up through the first year of college Physics. Particularly Electricity, Electronics and Newtonian Mechanics (motion, acceleration etc.). I decline questions on relativity and Atomic Physics. I also could discuss the Space Shuttle and space flight in general.

Experience

I have a BS in Physics and an MS in Electrical Engineering. I am retired now. My professional career was in Electrical Engineering with considerable time spent working with accelerometers, gyroscopes and flight dynamics (Physics related topics) while working on the Space Shuttle. I gave formal classroom lessons to technical co-workers periodically over a several year period.

Education/Credentials
BS Physics, North Dakota State University
MS Electrical Engineering, North Dakota State University

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