Question #4fef5
1 Answer
Not as far as we know.
Explanation:
If I understand the question correctly, you are asking if radio signals (or by implication any electromagnetic wave, since they all move at the same speed) can travel 30 years backwards in time.
No they cannot, as far as we know. It is true to state that that as an object’s velocity increases towards the speed of light the passage of time as measured by that object (or any ‘passenger’ on it) will slow down. This has lead some to imagine that if you go faster than speed of light, time may reverse, allowing you to visit the past.
There are two problems here, firstly any object with mass can never attain the speed of light as it would require an infinite amount of energy to be supplied.
Secondly, as electromagnetic waves travel at the speed of light they must be massless and time must stop from their perspective. Thus, for them, all points in space are as one, since it takes no time to travel between them, but this does not allow them to “travel” in time.
Like I said, not as far as we know.
