TSR Physics Society

Original post by Kyx

x

So, finally watched it. So, anti-quarks are come into being when the bound of the quarks to the gluons is broken? what has to be done that a quark is able to escape? glouns have strong attraction to quarks to hold them together, if I am not mistaken.

Reply 1182

Cerdic

18

Original post by Kallisto

So, finally watched it. So, anti-quarks are come into being when the bound of the quarks to the gluons is broken? what has to be done that a quark is able to escape? glouns have strong attraction to quarks to hold them together, if I am not mistaken.

Quarks and anti quarks can be made from a variety of interactions and at a variety of energies.

Quarks cannot "escape" as such because they cannot exist on their own due to something called colour confinement (think of the different colours adding to white - it must always be that way).

Reply 1183

I'm currently intrigued by the question 'what is time?'

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Reply 1184

Original post by Kallisto

So, finally watched it. So, anti-quarks are come into being when the bound of the quarks to the gluons is broken? what has to be done that a quark is able to escape? glouns have strong attraction to quarks to hold them together, if I am not mistaken.

It is not possible for quarks to escape due to something called quark (or colour) confinement, although there is a weird state of matter called a quark-gluon plasma which occurs at really high temperatures where quarks and gluons can be temporarily 'free'.

https://en.m.wikipedia.org/wiki/Quark-gluon_plasma

As the link states, it is possible to get quarks on their own, but they are very unstable, and after a few fractions of a second they will form hadrons and gamma rays.

The temperature required to create a Quark-gluon plasma is 2 trillion Kelvin (2,000,000,000,000 K). At this temperature pair production takes place and quark-antiquark pairs are produced. The highest temperature reached at the LHC is 5.4 trillion Kelvin (5,400,000,000,000 K), which is still too low for the quarks to truly be free since the strong charge still has some effect.

Spoiler

(edited 6 years ago)

Reply 1185

Original post by Kyx

It is not possible for quarks to escape due to something called quark (or colour) confinement, although there is a weird state of matter called a quark-gluon plasma which occurs at really high temperatures where quarks and gluons can be temporarily 'free'.

https://en.m.wikipedia.org/wiki/Quark-gluon_plasma

As the link states, it is possible to get quarks on their own, but they are very unstable, and after a few fractions of a second they will form hadrons and gamma rays.

The temperature required to create a Quark-gluon plasma is 2 trillion Kelvin (2,000,000,000,000 K). At this temperature pair production takes place and quark-antiquark pairs are produced. The highest temperature reached at the LHC is 5.4 trillion Kelvin (5,400,000,000,000 K), which is still too low for the quarks to truly be free since the strong charge still has some effect.

Spoiler

Thank you for informations and oh gosh! these temperatures are unimaginable high! even nuclear fusion does not need such high temperatures. And this temperatures are just required to be free for a very, very, very short while. The forces have to be incredible strong, no wonder, these ones are holding the basics of all subparticles together. Without them, nothing would exist.

Reply 1186

Original post by Kallisto

Thank you for informations and oh gosh! these temperatures are unimaginable high! even nuclear fusion does not need such high temperatures. And this temperatures are just required to be free for a very, very, very short while. The forces have to be incredible strong, no wonder, these ones are holding the basics of all subparticles together. Without them, nothing would exist.

I know right :biggrin:

It's terrific!!!

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Reply 1187

Do black holes have an event horizon?

http://www.zmescience.com/science/news-science/nothing-can-escape-black-holes-clutch-proves-einsteins-theory-relativity/?utm_source=ZME+Science+Newsletter&utm_campaign=1e80f0028c-RSS_EMAIL_CAMPAIGN&utm_medium=email&utm_term=0_3b5aad2288-1e80f0028c-242585537&goal=0_3b5aad2288-1e80f0028c-242585537

Reply 1188

Droneon

13

Ahh this thread is amazinggg :biggrin:

Reply 1189

Original post by Droneon

Ahh this thread is amazinggg :biggrin:

Reply 1190

Original post by Kallisto

x

Interesting to see that they are planning to use Hubble and the JWST together to make mini 3D movies of the outer planets to help inspire the next generation :biggrin:

ImageUploadedByStudent Room1497904811.254311.jpg

Reply 1191

Original post by Kyx

x

Yeah, read it. Interesting indeed. Maybe this is the end of sondes and satellites for searching and obervating planets, if the hubble and JWST method is good enough to get many informations and details about planets.

By the way what does JWST mean?

Reply 1192

Original post by Kallisto

Yeah, read it. Interesting indeed. Maybe this is the end of sondes and satellites for searching and obervating planets, if the hubble and JWST method is good enough to get many informations and details about planets.

By the way what does JWST mean?

Indeed it is interesting :biggrin:

JWST = James Webb Space Telescope

:smile:

Reply 1193

Droneon

13

Original post by Kyx

Interesting to see that they are planning to use Hubble and the JWST together to make mini 3D movies of the outer planets to help inspire the next generation :biggrin:

Woo, sounds really cool....

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Reply 1194

Original post by Kyx

Indeed it is interesting :biggrin:

JWST = James Webb Space Telescope

:smile:

Thanks for explaining that, kyx! let us see what comes about in the future. If it is something new, let me know and write here. :h:

Reply 1195

Original post by Kallisto

Thanks for explaining that, kyx! let us see what comes about in the future. If it is something new, let me know and write here. :h:

Np, will do :h:

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Pidge Gunderson

19

Any material to read which would give me a slight headstart before starting a physics degree at uni? I haven't taken Further Maths or any of the mechanics modules in Maths. Would this detriment me significantly?

Reply 1197

alow

19

Original post by Kyou

Any material to read which would give me a slight headstart before starting a physics degree at uni? I haven't taken Further Maths or any of the mechanics modules in Maths. Would this detriment me significantly?

If you really want a head-start, do some maths. The most important thing to do however is to relax and have some fun.

You'll be doing enough physics soon.

Reply 1198

Original post by Kyou

Any material to read which would give me a slight headstart before starting a physics degree at uni? I haven't taken Further Maths or any of the mechanics modules in Maths. Would this detriment me significantly?

Same situation here bro

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Reply 1199

Original post by Kallisto

x

I've just come up with a brilliant analogy of length contraction using a slinky :biggrin:

What happens when you drop a slinky? The top of it falls while the bottom seems to levitate in the air, until the top comes to meet it. The reason for this is that information cannot travel faster than the speed of light.

Imagine a rocket, one light year long. The engine at the back causes the rocket to move, but not all of it starts to move at the same time.

Let's say that the rocket travels at 100 miles per hour. The back of the rocket will start to move at 100 miles per hour (assuming it accelerates instantaneously from 0). The 'wave' of movement will move up the rocket until (information travelling at the speed of light) a year later the top of the rocket will begin to move at 100 miles per hour.

Since the bottom of the rocket has been travelling for longer than the top, it has travelled a further distance. The rocket is therefore shorter.

For the slinky, the information travels at the same speed as the slinky itself, equivalent to the rocket travelling at the speed of light. So if the rocket were to travel at the speed of light, it would be slinkified and have zero length! :biggrin:

What do you think? :biggrin: