12. points) If the magnetic field in a traveling EM wave has a peak magnitude of

Question

12. points) If the magnetic field in a traveling EM wave has a peak magnitude of 17.0 nTat a given point, what is the peak magnitude of the electric field? Equation to use Final Solution: 13. (4 points) When Apollo 11 landed on the moon, the time delay for Neil Armstrong's voice to travel from the moon to Earth would be equivalent to the delay from hearing a speaker 439.5 m away. Knowing the speed of sound to be 343 m/s, how far away is the moon? How much time is this lag? Equation (s) to use Final Solution:

Explanation / Answer

12.

E = c * B = 17 * 10^-9 * 3 * 10^8 = 5.1 N/C

13.

Time lag = 439.5/ 343 = 1.28 sec

Distance = 2.99 * 10^8 * 1.28 m = 3.8272 * 10^8 m

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