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Unformatted text preview: nguyen (jmn727) homework 33 Turner (59070) 1 This printout should have 11 questions. Multiplechoice questions may continue on the next column or page find all choices before answering. 001 10.0 points Consider the electromagnetic wave pattern as shown in the figure below. E B What is the direction in which the wave is traveling? 1. fromlefttoright. correct 2. fromrighttoleft. 3. undetermined, since the figure shows a standing wave. Explanation: The direction of traveling is the direction of vector E vector B ; i.e. , fromlefttoright. 002 (part 1 of 3) 10.0 points A plane electromagnetic sinusoidal wave of frequency 19 . 1 MHz travels in free space. The speed of light is 2 . 99792 10 8 m / s. Determine the wavelength of the wave. Correct answer: 15 . 6959 m. Explanation: Let : c = 2 . 99792 10 8 m / s , and f = 19 . 1 MHz = 1 . 91 10 7 Hz . The speed of light is c = f = c f = 2 . 99792 10 8 m / s 1 . 91 10 7 Hz = 15 . 6959 m . 003 (part 2 of 3) 10.0 points Find the period of the wave. Correct answer: 5 . 2356 10 8 s. Explanation: The period T of the wave is the inverse of the frequency: T = 1 f = 1 1 . 91 10 7 Hz = 5 . 2356 10 8 s ....
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 Spring '08
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