Question

How long will it take a radiowave of frequency $6\times {10}^3{s}^{-1}$ to travel from one place to other? The distance is ${10}^{14}km$.

Answer 1

$C=3X10^{8}m/s$

$d=10^{14}km=10^{17}m$

velocity=$\frac{distance}{time}$

$\Rightarrow C=\frac{d}{c}$

$\Rightarrow t=\frac{d}{c}$

$\Rightarrow t=\frac{1X10^{17}m}{3X10^{8}m/s}$

$\Rightarrow t=\frac{1X10^{9}m}{3}s$

$\Rightarrow t=\frac{1X10^{9}m}{3X10^6}min$

$\Rightarrow t=0.555X10^{9}min$