You have a piano, and you ask for the best piano tuner EVER. You ask her to tune the piano perfectly. She says “No problem, it will only

take”...20% 20% 20%20%20%

1. About an hour

2. About a day

3. About a week

4. About a month

5. About forever

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The speed of a photon in vacuum is known precisely in all circumstances. It follows from the uncertainty principle that nothing can be known

about the photon’s postion.33% 33%33%

1. True

2. False

3. False, but because the speed is not really known precisely

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A free electron moves along the x-axis, and has a localized wave function. The uncertainty in its momentum is

decreased if:

20% 20% 20%20%20%1. The wave function is made more narrow

2. The wave function is made less narrow

3. Wave function is unchanged, but its energy is increased

4. Wave function is unchanged, but its energy is decreased

5. None of the above

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