# Relativistic effects

## Main Question or Discussion Point

In a text book about relativity, I read that particle accelarators can get to a limit because of the relativistic effects. Is that not the limit of speed of light?

Thanks for any help.

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Please quote the original text for clarity. Thanks.

ZapperZ
Staff Emeritus
In a text book about relativity, I read that particle accelarators can get to a limit because of the relativistic effects. Is that not the limit of speed of light?

Thanks for any help.
That would be the most obvious thing to assume, but as neutrino has pointed out, in this forum, before we can comment on what you think you read, we have to know exactly where you read it from. Just saying "I read somewhere" or "I heard this somewhere" is not good enough for this forum. I hope everyone, especially the newbies, is aware of this.

Zz.

George Jones
Staff Emeritus
Gold Member
In a text book about relativity, I read that particle accelarators can get to a limit because of the relativistic effects. Is that not the limit of speed of light?

Thanks for any help.
Yes, there is a limit to the speed (with repspect to Earth) that an accelerator can impart to a particle, but, in principle (practice is a different story), there in no limit to the energy that an accelerator can impart to a particle.

In a text book about relativity, I read that particle accelarators can get to a limit because of the relativistic effects. Is that not the limit of speed of light?

Thanks for any help.
The speed limit of tardyon's (defined as particles for which v < c at all times) is obviously yes. Tardyon's are things like electrons, protons, positrons, antiprotons, etc. The are two other classes of particles. One is a Luxon for which v = c at all times (e.g. a photon) while the last one is a Tachyon for which v > c at all times. Tachyon's have never been observed so for all we know they don't exist. I read the arguement for their existance and found it weak to flawed myself. That is just my personal opinion. But I doubt many physicists believe in the existance of Tachyons. However if they did exist then they are born moving faster than light and at best one accelerates it to as high of a speed as one wishes or decelerates it to a lower bound of the speed of light.

Best regards

Pete

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The speed limit of tardyon's (defined as particles for which v < c at all times) is obviously yes. Tardyon's are things like electrons, protons, positrons, antiprotons, etc. The are two other classes of particles. One is a Luxon for which v = 0 at all times (e.g. a photon) while the last one is a Tachyon for which v > c at all times. Tachyon's have never been observed so for all we know they don't exist. I read the arguement for their existance and found it weak to flawed myself. That is just my personal opinion. But I doubt many physicists believe in the existance of Tachyons. However if they did exist then they are born moving faster than light and at best one accelerates it to as high of a speed as one wishes or decelerates it to a lower bound of the speed of light.

Best regards

Pete
Did you mean, "One is a Luxon for which v = c at all times?"

Did you mean, "One is a Luxon for which v = c at all times?"
Yes! Thank you very much for pointing that out for me. I have gone back and corrected it now.

Thanks again!

Pete

Yes! Thank you very much for pointing that out for me. I have gone back and corrected it now.

Thanks again!

Pete
You are welcome. :)