1) A plane wave has: (check all that apply) a) large uncertainty in position b)

Question

1) A plane wave has: (check all that apply)

a) large uncertainty in position

b) small uncertainty in position

c) large uncertainty in momentum

d) small uncertainty in momentum

2)Relative to a plane wave, a wave packet has: (check all that apply)

a) larger uncertainty in position

b) smaller uncertainty in position

c) larger uncertainty in momentum

d) smaller uncertainty in momentum

3) Explain, in terms of what happens to a wave function when you make a measurement, why you can't know both the position and the momentum of a quantum mechanical object at the same time ?

Explanation / Answer

1) A plane wave has small uncertainty in momentum.

2) Relative to a plane wave, a wave packet has larger uncertainty in momentum

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