F08 - Exam 4B(1)

# F08 - Exam 4B(1) - MC 11 12 Raw Score Final Percentage...

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MC __________ 11 __________ 12 __________ Raw Score __________ Final Percentage __________% MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. Write your answer at the right. (2 points each) 1) A planar electromagnetic wave is propagating in the positive x - direction. At a certain point P and at a given instant, the electric field of the wave is given by E = - j 12 mV/m. The Poynting vector at the point P at that instant is closest to: A) ( - 1.9 × 10 - 7 W/m 2 ) k B) ( + 3.8 × 10 - 7 W/m 2 ) i C) ( - 3.8 × 10 - 7 W/m 2 ) i D) ( + 1.9 × 10 - 7 W/m 2 ) i E) ( - 1.9 × 10 - 7 W/m 2 ) i 1) 2) When light travels from air into water, A) its frequency changes, but its velocity and wavelength do not change. B) its wavelength changes, but its velocity and frequency do not change. C) its velocity changes, but its frequency and wavelength do not change. D) its velocity, wavelength, and frequency all change. E) its velocity and wavelength change, but its frequency does not change. 2) A-1

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3) A ray in glass is incident onto a water - glass interface, at an angle of incidence equal to half the critical angle for that interface. The indices of refraction for water and the glass are 1.33 and 1.60,
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F08 - Exam 4B(1) - MC 11 12 Raw Score Final Percentage...

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