What is the smallest particle ever detected by scientists?

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Discussion Overview

The discussion revolves around the question of what is the smallest particle or "thing" that has been detected by scientists, with a focus on detection methods such as microscopy and particle colliders. Participants explore various aspects of particle detection, including atoms, electrons, and sub-atomic particles.

Discussion Character

  • Exploratory
  • Debate/contested
  • Technical explanation

Main Points Raised

  • Some participants mention that atoms have been observed using microscopes, suggesting that detection may not go much smaller than this.
  • Others reference a video that purportedly shows electron shells, raising questions about the interpretation of what is being observed.
  • A few participants discuss the detection of electrons, with one noting that electrons can leave trails in cloud chambers visible to the naked eye.
  • There is mention of atomic force microprobes and their ability to probe atoms on solid surfaces, though some question whether this is the correct technique.
  • One participant proposes that sub-atomic particles created in particle colliders might represent the smallest entities detected, introducing the concept of "point particles" and questioning if neutrinos could be considered the smallest detected particles.
  • Humor and light-hearted banter appear throughout the discussion, with participants making jokes about personal anecdotes and the nature of the thread.

Areas of Agreement / Disagreement

Participants express differing views on what constitutes the smallest particle detected, with some focusing on atoms and electrons, while others suggest sub-atomic particles from colliders. The discussion remains unresolved with multiple competing perspectives.

Contextual Notes

Participants do not reach a consensus on definitions of "smallest particle" or the methods of detection, leading to ambiguity in the discussion.

Trevormbarker
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Smallest 'thing" detected yet

I wasnt too sure where to post this but I settled on quantum physics.
I was wondering what the smallest particle or "thing" any human has ever seen with the aid of a microscope or any kind of magnifying tool.
 
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We have seen atoms under the microscope. I don't think we can go much smaller than that...

https://www.youtube.com/watch?v=O_PjMeukmzg
 


According to this site, an eletron has been detected. I'm not sure that it fits what you are looking for.

http://blogearth.wordpress.com/2008/02/27/electron-filmed-for-the-first-time/"
 
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micromass said:
We have seen atoms under the microscope. I don't think we can go much smaller than that...

https://www.youtube.com/watch?v=O_PjMeukmzg
Yeah - that's pretty much it. Atomic force microprobes have probed atoms on the surface of solids.

http://www.parkafm.com/?gclid=COmN5prhoqoCFULc4Aodtx8hWA

http://www.home.agilent.com/agilent/product.jspx?nid=-33986.0.00&cc=US&lc=eng

Disclaimer: No endorsement expressed or implied.

http://www.mrsec.org/facilities/atomic-force-microscopescanning-tunneling-microscope
 
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What are we looking at in that video? Are those the electron shells?
 


Jimmy Snyder said:
According to this site, an eletron has been detected. I'm not sure that it fits what you are looking for.

http://blogearth.wordpress.com/2008/02/27/electron-filmed-for-the-first-time/"
Apparently electrons listen to new-age music :wink: Although I am slightly curious for more details as well.
 
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thanks for all the replies!
 


Astronuc said:
Yeah - that's pretty much it. Atomic force microprobes have probed atoms on the surface of solids.

Are you sure that its AFM? I would have guessed http://en.wikipedia.org/wiki/Transmission_electron_microscopy" .
 
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Is it this?

DSC4564-XL.jpg
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  • #10


Phew, i thought my ex girlfriend had found this site.
 
  • #11


Andy said:
Phew, i thought my ex girlfriend had found this site.

:smile::smile::smile:
 
  • #12


Andy said:
Phew, i thought my ex girlfriend had found this site.

HAH!

Smallest thing seen with the naked eye or "effects of" seen with the naked eye? Because you can quite clearly see the trail left by an electron traveling through a cloud chamber with your naked eye.
 
  • #13


Those videos impressed me. I had seen photos of atoms but no video. Nice.
 
  • #14


Andy said:
Phew, i thought my ex girlfriend had found this site.

Are you after my badge, you old bugger? I was all set to post something similar, and you beat me to it.


:biggrin:
 
  • #15


micromass said:
We have seen atoms under the microscope. I don't think we can go much smaller than that...

That's an interesting video, especially towards the end! Are the atoms there shown to move, or is this some kind of microscope artifact? If they can be shown to move, is there any video of chemical reactions in the atomic level?
 
  • #16


Are you after my badge, you old bugger? I was all set to post something similar, and you beat me to it.

Old? HA! any idea how old i am? Just because i have been loitering around the site for the past decade doesn't make me old.

Oh and to quote a famous film, "Badges? We don't need no stinking badges!"
 
  • #17


I'm kind of confused by this question, surely the smallest "thing" ever detected are the sub-atomic particles created in particle colliders? :confused:
 
  • #18


ryan_m_b said:
I'm kind of confused by this question, surely the smallest "thing" ever detected are the sub-atomic particles created in particle colliders? :confused:


Is there such a thing as a "point particle"? Are neutrinos the smallest thing ever detected? Past a certain point it is as much a philosophical debate as a scientific one.
 
  • #19


Andy said:
Old? HA! any idea how old i am?
Well... uh... going by your writing style, I figure about 114. I'm sorry if I underestimated...


Andy said:
and to quote a famous film, "Badges? We don't need no stinking badges!"

Ahhhh... a connoisseur of the classics... :biggrin:
 
  • #20


25. Gotta love abit of mel.
 

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