# Answer to Question #13397 in Electromagnetism for Bruce Patterson

Question #13397

I wonder about the following: if time actually is the dimension of sequence then energy moving at the speed of light would take a certain amount of time to travel the distance of one Plank. That amount of time is the smallest increment of time/sequence possible and is the reason that the speed of light is what it is. Time will not allow a faster speed--it cannot be sequenced.

So then--my question--does this simplistic logic merit further contemplation on my part?

Thank you

Bruce Patterson

So then--my question--does this simplistic logic merit further contemplation on my part?

Thank you

Bruce Patterson

Expert's answer

http://en.wikipedia.org/wiki/Planck_units

http://en.wikipedia.org/wiki/Planck_time

from this point of view, all particles can not move faster then light.

BUT! from special relativity. delta tau = delta t * sqrt{1-V^2/c^2} - well known formula, when V=c, delta tau=0.

http://en.wikipedia.org/wiki/Tachyon

At this moment we didn't find tachyons, so we think that speed of light is maximum, but if we will find them => Planks distance is nor the smallest, and in fact our Universe (space) is not discrete

http://en.wikipedia.org/wiki/Planck_time

from this point of view, all particles can not move faster then light.

BUT! from special relativity. delta tau = delta t * sqrt{1-V^2/c^2} - well known formula, when V=c, delta tau=0.

http://en.wikipedia.org/wiki/Tachyon

At this moment we didn't find tachyons, so we think that speed of light is maximum, but if we will find them => Planks distance is nor the smallest, and in fact our Universe (space) is not discrete

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