# What happens if an object falling in vacuum(disobeys the general theory of relativity), falls faster than the speed of light?

+ 0 like - 0 dislike
9243 views

I know the question sounds crazy enough to laugh at. But what if it happens? Feel free to criticize and give some astounding answers!

recategorized Oct 30, 2021

+ 0 like - 0 dislike

There's a problem of getting 'over the fence' - to reach the speed of light you need infinite energy - in special relativity you have a 'gamma' factor which goes infinite when v=c  .
And it gets weird from there, the energy amongst other quantities goes imaginary if v>c.   Possibly such things could exists from the get-go and thus wouldnt have to cross the v=c barrier, the idea is called 'tachyons' but I blv. no evidence exists for them and its not clear if these should be detectable.

answered Oct 20, 2021 by (0 points)
+ 0 like - 0 dislike
There will be a kind of Cherenkov effect as in all physical media where the speed of
the particle exceeds the speed of light. 
answered Oct 23, 2021 by anonymous

 Please use answers only to (at least partly) answer questions. To comment, discuss, or ask for clarification, leave a comment instead. To mask links under text, please type your text, highlight it, and click the "link" button. You can then enter your link URL. Please consult the FAQ for as to how to format your post. This is the answer box; if you want to write a comment instead, please use the 'add comment' button. Live preview (may slow down editor)   Preview Your name to display (optional): Email me at this address if my answer is selected or commented on: Privacy: Your email address will only be used for sending these notifications. Anti-spam verification: If you are a human please identify the position of the character covered by the symbol $\varnothing$ in the following word:p$\hbar$ysics$\varnothing$verflowThen drag the red bullet below over the corresponding character of our banner. When you drop it there, the bullet changes to green (on slow internet connections after a few seconds). Please complete the anti-spam verification