Question

If it were possible to travel at the speed of light, you could be in all places at all times.” Using your understanding of physics, discuss this statement.

Answer 1

Solution

According to results of Relativity's Special Theory we have:

Where, is the length of the object at rest. Now if the speed of the object is:

Therefore, equation (1) is:

Which means that the length of the object is compressed to a "point". Now, for the time we have:

now, If

we have that:

This means that for the object traveling at the speed of light it is not affected by the passage of time. From the point of view of an observer at rest who observes this hypothetical scenario, it is observed as if the object were everywhere at any time.