This preview has intentionally blurred sections. Sign up to view the full version.
View Full Document
Unformatted text preview: benavides (jjb2356) – homework 33 – Turner – (59130) 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. undetermined, since the figure shows a standing wave. 2. fromrighttoleft. 3. fromlefttoright. correct 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 40 . 3 MHz travels in free space. The speed of light is 2 . 99792 × 10 8 m / s. Determine the wavelength of the wave. Correct answer: 7 . 43902 m. Explanation: Let : c = 2 . 99792 × 10 8 m / s , and f = 40 . 3 MHz = 4 . 03 × 10 7 Hz . The speed of light is c = λ f λ = c f = 2 . 99792 × 10 8 m / s 4 . 03 × 10 7 Hz = 7 . 43902 m . 003 (part 2 of 3) 10.0 points Find the period of the wave. Correct answer: 2 . 48139 × 10 8 s. Explanation: The period T of the wave is the inverse of the frequency: T = 1 f = 1 4 . 03 × 10 7 Hz = 2 . 48139 × 10 8 s ....
View
Full Document
 Spring '08
 Turner
 Work, Light, 5 w, 0.00105 M, 2 0.00105 m

Click to edit the document details