Large Hadron Collider Question

In summary: This is how it appears to an observer that is not trying to solve the problem. It only makes sense when you put yourself in the shoes of someone trying to reach 1 or 0.
  • #1
Mykal
2
0
Hello All

This is a question from a complete physics ingnoramus, and a quick search on google brought this forum up as a good place to start! Also, apologies if I'm in the wrong bit of the forum.

Right, the question. I've been reading about the Large Hadron Collider in Cern, and it keeps making reference to the particles colliding at 99.99% of the speed of light. Why is it 99.99% of the speed of light, if they are able to accelerate them up to 99.99%, what is stopping them being accelerated to the speed of light?

Idiot proof answers please!

Mykal
 
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  • #2
Hi Mykal, and welcome to PF :smile:
Mykal said:
Why is it 99.99% of the speed of light, if they are able to accelerate them up to 99.99%, what is stopping them being accelerated to the speed of light?
It is increasingly difficult to accelerate near the speed of light. Going from 98% to 99% requires more energy than going from 97% to 98%. You could think schematically, it will take as much energy to from 88% to 98%, than to go from 98% to 99%, or from 99.9% to 99.99%, or from 99.99% to 99.999%... So it would take infinite energy to go to 100%
 
  • #3
The relation between velocity and energy is:

[tex]
v = c \sqrt{1 - \frac{m^2 c^ 4}{E^2}}
[/tex]

You can see that as E gets arbitrarily large, v gets arbitrarily close to c, but that it has to be infinite for it to equal c. You will also see that 99.99% is an underestimate: 99.999999% is closer to the mark.
 
  • #4
Basically you'd need an infinite amount of energy to have something going at the speed of light, the closest we can get is 99"-and-some-change"%
 
  • #5
According to Einsteins theory of relativity. Objects gain mass as the approach the speed of light. The closer you get the more the mass increases and the harder it gets to increase the speed.
 
  • #7
Excellent. Thanks for your patience and responses guys. I hope you realize that this has given me more things to read about, so be prepared for another round of educate the dummy, especially when the LHC is up and colliding!
 
  • #8
I am not qualified to provide a better solution as any of the above answers, but I would like to reflect on the trouble with understanding how something that is 99.9 or 99.99 or 99.99999 etc becomes hard to grasp in being that it seems so easy to attain the next level of higher numeric value or "wholeness/completness". I hope this graph helps. Just think of it in reverse. I don't want to confuse the discussion, but look at it by comparing the futility of trying to obtain the value of 1 to the opposite of the value of zero. I have had the opportunity to work with many radioactive materials and observe their decay rates. When you graph them out, they always show that they can never reach total decay of the amount first measured, even if the amount measured was billions of atoms or a few. Even if the time of decay (half life) was millions of years or 13 seconds. How does this apply to the question asked above? It is only an attempt to show how logarithmic changes or attempts to reach infinity in solving an observable event can seem so strange and defy common sense.

http://www.moltensalt.org/references/static/home.earthlink.net/bhoglund/images/cs_137_decay_graph.gif

The graph above is not the best example, but if you could look at it close enough, the numbers curve down, but never touch the lines because you can not reach zero
 

FAQ: Large Hadron Collider Question

What is the Large Hadron Collider?

The Large Hadron Collider (LHC) is the world's largest and most powerful particle accelerator. It is a 27-kilometer ring located beneath the France-Switzerland border, designed to collide beams of protons or lead ions at nearly the speed of light.

What is the purpose of the Large Hadron Collider?

The main purpose of the LHC is to explore the fundamental building blocks of the universe and the laws that govern them. It also aims to recreate conditions similar to those that existed in the early universe, just after the Big Bang.

What are the potential risks associated with the Large Hadron Collider?

There have been concerns about the safety of the LHC, with some people fearing that it could create a black hole that could destroy the Earth. However, extensive safety studies have been conducted and have concluded that the LHC is not capable of producing any dangerous scenarios.

What are some of the major discoveries made by the Large Hadron Collider?

The LHC has made several groundbreaking discoveries, including the confirmation of the existence of the Higgs boson in 2012. It has also provided evidence for the existence of exotic particles such as pentaquarks and tetraquarks, and has contributed to our understanding of dark matter and antimatter.

What are some of the future plans for the Large Hadron Collider?

The LHC is currently undergoing upgrades to increase its energy and luminosity, allowing for more precise and detailed experiments. There are also plans for future particle accelerators, such as the High-Luminosity LHC and the Future Circular Collider, which will push the boundaries of our understanding of the universe even further.

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