أنشئ حسابًا أو سجّل الدخول للانضمام إلى مجتمعك المهني.
Considering the radius of Earth is 6,371 km
The circumference of a cross section of earth will be2*pi*r= .59 m
And since the speed of light is about 3*10^8 m/sec
So, the number of seconds should be around (.59/3*10^8)=0.13 second
or130 millisecond!
