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Insights Can We See an Atom? - Comments

  1. Sep 28, 2015 #1

    klotza

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  2. jcsd
  3. Sep 28, 2015 #2

    anorlunda

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    Kudos on your Insights article. Your explanations and graphics helped make it clear.
     
  4. Sep 28, 2015 #3
    I've seen many of these "atom" photos online. Nice to get some explanations!
     
  5. Sep 29, 2015 #4
    Last edited by a moderator: Sep 29, 2015
  6. Oct 4, 2015 #5
    Thank You for this really nice article !!
     
  7. Oct 5, 2015 #6

    klotza

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    Glad you liked it!
     
  8. Oct 12, 2015 #7
    Very interesting.

    But I'm confused with the image just below the text that reads: "The technology has improved over the years, and now it is possible perform TEM on single-layer graphene and see the atomic structure from a sheet of carbon, which I think is pretty impressive."

    This illustration pretty clearly shows carbon atoms as *light* spots, not dark spots. But the caption to the immediately previous image reads: "The bright spots on the image are regions where there are fewer atoms blocking the electrons."

    In a TEM image, are the atoms bright, or are they dark?
     
  9. Oct 18, 2015 #8
    Great job, Klotza!
     
  10. Oct 18, 2015 #9

    klotza

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    Thanks!
     
  11. Dec 10, 2015 #10
    it depends whether they're dark field or bright field image.
     
  12. Dec 10, 2015 #11

    DrDu

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    How did Ernst Mach say: "Ah Atome! Ham's scho ans g'sehn?" (Ah atoms! Did you already see one?)
     
  13. Feb 15, 2016 #12
    "Can We See an Atom?"

    Heck, I've never seen my face. I'm sure I got one.

    Have we ever seen the sun, much less other stars? We see their light, yet where are they when we finally perceive them? You can do the math; it's hurting my head to figure it. I am sure these heavenly bodies aren't where they were when we finally perceive their light.

    Have we seen the Higgs boson?

    <detour> Higgs boson walks into church. Priest says, we don't allow Higgs boson in here. Higgs boson says, yeah, but without me how can you have mass? </detour>

    Stick a fork in me. :)
     
  14. Nov 6, 2016 #13

    A. Neumaier

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    ''the tunneling probability depends on the electron density of the surface, so you can actually visualize the wavefunction of the unbound surface electrons, in the images.'' The second half is not quite true, as the wave function of the electrons is a multiparticle wave function and we see something in 3 dimensions. What is visualized is the charge density of the electron field.
     
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