The frequency of a radio wave from Mars to Ea | vedclass

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Question

(B) The speed of a radio wave is the speed of light,$c = 3 	imes 10^8 \, m/s$. Distance $d = 8 	imes 10^7 \, km = 8 	imes 10^{10} \, m$. Time $t =

Vedclass · Accepted Answer

$4 \, min \, 26 \, sec$

Vedclass · Answer

(B) The speed of a radio wave is the speed of light,$c = 3 	imes 10^8 \, m/s$. Distance $d = 8 	imes 10^7 \, km = 8 	imes 10^{10} \, m$. Time $t = \frac{d}{c} = \frac{8 	imes 10^{10} \, m}{3 	imes 10^8 \, m/s} = 2.66 	imes 10^2 \, s$. $t = 266 \, s$. Converting to minutes: $266 \, s = 4 \, min \, 26 \, s$ ($4 	imes 60 = 240 \, s$,$266 - 240 = 26 \, s$).

The frequency of a radio wave from Mars to Earth is $6 \times 10^3 \, s^{-1}$. If the distance between them is $8 \times 10^7 \, km$,how much time will it take?

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