National Geographic: Fake News?

[Valentin Albillo]

(04-07-2019 02:10 PM)rprosperi Wrote:  

(04-07-2019 01:57 PM)Thomas Okken Wrote:  When \(v=c\) you get a division by zero, so that's clearly no good, but when \(v>c\), the time dilation (and relativistic mass) become imaginary, so how is that supposed to correspond to any physical reality?

If one can devise a method to surpass the speed of light, you get a free pass on breaking other laws. Also I imagine traveling beyond the speed if light is cool.

Indeed. Besides, travelling faster than the speed of light, while not forbidden by relativity, implies being able to time-travel to the past, which would then potentially generate all kind of causality paradoxes, which is deemed physical laws wouldn't allow as it would destroy consistency wholesale.

Some of the paradoxes are much worse from a logical point of view than simply killing your own grandfather, see:

Tachyonic antitelephone

Best regards and have a nice remaining weekend.

V.
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