Physics Paper 2, May/June. 2010  
Questions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Main
General Comments
Question 10

(a)State the Heisenberg Uncertainty Principle.
(b)The product of the uncertainties in Heisenberg Uncertainty Principle is equal to or greater than a constant. State the mathematical expression for this constant.

Many candidates could not give the correct statement neither could they reproduce planks constant.
The expected answers are:
(a) It is impossible to determine (accurately) both the wave properties of matter and its particulate properties at the same time OR In any simultaneous determination of the position x and momentum p of a particle, there.
is an uncertainty in its position L\ x and an uncertainty in its momentum ∆p.
  (b)       1)  ORh

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