You%20have%20a%20piano,%20and%20you%20ask%20for%20the%20best%20piano%20tuner%20EVER.%20You%20ask%20her%20to%20tune%20the%20piano%20perfectly.%20She%20says%20 - PowerPoint PPT Presentation

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You%20have%20a%20piano,%20and%20you%20ask%20for%20the%20best%20piano%20tuner%20EVER.%20You%20ask%20her%20to%20tune%20the%20piano%20perfectly.%20She%20says%20

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About a week. About a month. About forever. 30. 0 of 250. The speed of a photon in vacuum is known precisely in all circumstances. ... – PowerPoint PPT presentation

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Title: You%20have%20a%20piano,%20and%20you%20ask%20for%20the%20best%20piano%20tuner%20EVER.%20You%20ask%20her%20to%20tune%20the%20piano%20perfectly.%20She%20says%20


1
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...
  1. About an hour
  2. About a day
  3. About a week
  4. About a month
  5. About forever

2
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 photons postion.
  1. True
  2. False
  3. False, but because the speed is not really known
    precisely

3
A free electron moves along the x-axis, and has a
localized wave function. The uncertainty in its
momentum is decreased if
  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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