− 4 28 μ C charge is 10 cm to the right, as shown

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Version 036 – Final 58010 Fall 14 – yeazell – (58010) 1 This print-out should have 25 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. 001 10.0points A Michelson interferometer is used to mea- sure the wavelength of a light source. When one of the mirrors is moved a distance L =0 . 436012 mm, we observe at the output N =1847 transitions from light to dark back to light. What is the wavelength λ of the light? All possibilities: right, left, or zero 5. Up 6. Left 1. 5.54204e-07 2. 4.7213e-07 3. 7.03422e-07 4. 4.55031e-07 5. 6.01171e-07 6. 3.43776e-07 7. 5.84537e-07 8. 4.03651e-07 9. 6.3556e-07 10. 4.86054e-07 Correct answer: 4 . 7213 × 10 7 m. Explanation: A transition from light to dark back to light occurs when the mirror is moved a distance of λ 2 , so Nλ/ 2 = L λ = 2 L/N = 4 . 7213 × 10 7 m 002(part1of2)10.0points A 1 . 62 μ C charge is at the origin and a 1. None of these 2. Right correct 3. Down 4. All possibilities: right, left, or zero 5. Up 6. Left 10. 21210600.0
4 . 28 μ C charge is 10 cm to the right, as shown.
Version 036 – Final 58010 Fall 14 – yeazell – (58010) 2 | E | = 2 . 12106 × 10 7 N / C 004 10.0points Consider a monochromatic electromagnetic plane wave propagating in the z direction. At a particular point in space, the magnitude of the electric field has an instantaneous value of 602 V / m in the positive x -direction. The wave is traveling in the positive z -direction. z x y E wave propagation Find the instantaneous magnitude of the Poynting vector at the same point and time. 7
10 m · N / A and the permittivity of free space 8 . 85419 × 10 12 C 2 / N · m 2 . 1. 74.0291 2. 426.833 3. 676.943 4. 299.673 5. 33.297 6. 1837.45 7. 8.8987 8. 961.972 9. 779.773 10. 1177.38

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