"Phil" wrote in message
...
Greetings to all ...

My wife and I got into a discussion last nite after looking at Mars
through the telescope. A question arised and we were wondering
if someone could answer it ...

If a radio signal travels at the speed of light (186,200 miles per
second), then how long would it take it to get to Mars - from Earth?

36,000,000 miles is a very long way for a radio signal to travel

(36,000,000 miles)/(186,200 miles/sec) = 193.34 seconds

Or about 3.2 minutes.

Radio signals are just electromagnetic in nature just as
light is (light is just higher in frequency than what we
consider to be radio waves). So consider how much further
the "signals" from the distant stars have come compared to
one from Mars.