Oscillating Stand
Help with waves and Optics!?
1. In an electromagnetic wave traveling towards the west, the B field oscillates vertically and has a frequency 82.5 kHz and an RMS power of 7.65 multiplied by 10 ^ -9 T. What are the frequency and strength of the effective electric field? http://www.webassign.net/giancoli/22-07.gif 2. A voice of the radio signal from the crew of Apollo on the Moon was transmitted to a crowd listening to a radio speaker. If you were standing 55 m from the speaker, what is the total delay between when you heard the sound and when its left on the Moon?
1. The frequency is number of cycles / sec. From observation of the figure shows that the field E and B cross field of the X axis at a time when their frequencies are the same. It is to say the frequency (E) = field frequency (area B) I'll let you work. c (speed of light) = 3 * 10 ^ 8 m / s C = Erms / BRMS You are given C and BRMS. Solve for Erms. BRMS Erms * C = = 2.295
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