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#Mon Aug 09 11:51:18 CEST 2010
Text__pRj5oKObEd-WfYQ0GneCwQ_text=The uncertainty principle states that there are properties of particles that are  complementary to each other (for example, the position and velocity of a particle) that  both can not be determined with accuracy. The more exact the value of one property is,  the less exact the value of the other property. <p>In a letter to Einstein, Bohr argues\:  Therefore it becomes possible in quantum mechanics to use pairs of terms such as wave  and particle simultaneously without contradiction, even though these pairs seem  contradictory in daily usage.</p>
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