Question

German physicist gave a principle about the uncertainties in simultaneous measurement of position and momentum of small particles. According to that physicist, it is impossible to measure simultaneously the position and momentum of small particle simultaneously with absolute accuracy or certainty. If an attempt is

made to measure any one of these two quantities with higher accuracy, the other becomes less accurate. The product of the uncertainty in position () and uncertainty momentum ()is always constant and is equal to or greater than h/4π where h is Plank’s constant,i.e.

The uncertainty in position of an electron (m = 9.1 x10–28 gm) moving with a velocity 3 x 104 cm/s accurate up to 0.001% will be

Answer 1

Uncertainty principle, also called Heisenberg uncertainty principle or indeterminacy principle, statement, articulated (1927) by the German physicist Werner Heisenberg, that the position and the velocity of an object cannot both be measured exactly, at the same time, even in theory. The very concepts of exact position and exact velocity together, in fact, have no meaning in nature.

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