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HW10problem_pdf

# HW10problem_pdf - luu(nml299 HW10 markert(58710 This...

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luu (nml299) – HW10 – markert – (58710) 1 This print-out should have 23 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. 001 10.0 points If the momentum of an electron doubles, by what factor would its de Broglie wavelength be multiplied? 1. λ λ = 1 4 2. λ λ = 1 3. λ λ = 2 4. λ λ = 1 2 5. λ λ = 4 002 10.0 points One electron travels twice as fast as another. Which has longer wavelength? 1. The two have the same wavelength. 2. The slower one 3. More information is needed. 4. The faster one 003 10.0 points Suppose optical radiation ( of wavelength 6 × 10 7 m) is used to determine the position of an electron to within the wavelength of the light. The mass of an electron is 9 . 10939 × 10 31 kg and the Planck’s constant is 6 . 62607 × 10 34 J · s. What will be the minimum resulting uncer- tainty in the electron’s velocity? Answer in units of m / s. 004 10.0 points A 74 . 1 g ball moves at 38 . 8 m / s. If its speed is measured to an accuracy of 0 . 16%, what is the minimum uncertainty in its position? Answer in units of m. 005 (part 1 of 2) 10.0 points In the diagram, the energy difference between states A and B is twice the energy difference between states B and C. In a transition (quan- tum jump) from C to B an electron emits a photon of wavelength 600 nm.

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