ConceptTests_part1_all

ConceptTests_part1_all - Quantum I (PHYS 3220) concept...

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Quantum I (PHYS 3220) concept questions
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Clicker Intro
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Do you have an iClicker? (Set your frequency to CB and vote.) A) Yes B) No 2
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Have you looked at the web lecture notes for this class, before now? A) Yes B) No 3
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Intro to Quantum Mechanics
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In Classical Mechanics, can this equation be derived? A) Yes B) No t p F net d d = 4
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Can this equation be derived? A) Yes B) No t L net d d = τ 5
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(ICLICKER frequency is CB) Have you done the assigned reading for today? A) Yes – Griffiths only B) Yes – Web notes only C) Yes – both text and notes D) Not really – but I will soon! E) Nope 3
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Postulate #3 says = Prob(particle is between x and x+dx) What conclusion can you draw? ψ ( x ) 2 dx A) must be exactly =1 B) is finite, but needn’t =1 C) must be finite at all x. D) More than one of these E) One/more are true, but do not follow ( x ) 2 dx -∞ ( x ) 2 dx -∞ ( x ) 2
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Is the wave function Ψ = Ψ (x) shown normalized? Note that this is a plot of | Ψ | 2 vs. x. 6
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Is this wave function normalized? (This wave function is pure real) 7
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How would you physicall y interpret the wave function in the sketch? B) QM doesn’t let you “interpret” wave functions like this C) It’s a large particle D) a small particle E) a particle located at a definite spot (x 0 ) A) This doesn’t look very physical…
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Statistics and Probability
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You flip an ordinary coin in the air and get 3 heads in 3 tosses. On the 4 th toss, the probability of heads is … A) greater than 50% B) less than 50% C) equal to 50% 9
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Plinko! A marble is released from the same starting point each time. Classical physics says identical systems with exactly the same initial conditions always lead to the same final result, in a deterministic and repeatable way. Is the distribution of final outcomes for the Plinko game (played 300 times) in this example in conflict with our theories of classical systems? A) Yes B) No 10
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Ψ | 2 is plotted for a normalized wave function Ψ (x). What is the probability that a position measurement will result in a measured value between 2 and 5? A)2/3
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This note was uploaded on 02/27/2012 for the course PHYSICS 3220 taught by Professor Stevepollock during the Fall '08 term at Colorado.

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ConceptTests_part1_all - Quantum I (PHYS 3220) concept...

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