w a sehematie picture for an Electromagnetie wave propagating along x direotion,
ID: 2305118 • Letter: W
Question
w a sehematie picture for an Electromagnetie wave propagating along x direotion, showing E and B fields together with appropriate directions 7. Neil A. Armstrong was 10" m. (a) Find the time it took for his voice to reach the earth via radio waves. (b) Someday a person will which is 5.60 x 1010 m from the earth at the point of closest approach. Determine the minimum time that will be requ the first person to walk on the moon. The distance between the earth and the moon is 3.85 for a message from Mars to reach the earth via radio waves. (c fi)Explanation / Answer
(A) for radiowave, v = c = 3 x 10^8 m/s
t = d / v = (3.85 x 10^8 m) / (3 x 10^8 m/s)
t = 1.28 sec .....Ans
(B) now d = 5.60 x 10^10 m
t = d / v = 186.67 sec
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