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Cake day: June 18th, 2023

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  • plandeka@lemmy.worldtoPolitical Memes@lemmy.worldDon't go red!
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    2 months ago

    Fuck Trump and Musk, but seriously, this comic is just shit. Whatever you people call communism in the US has nothing to do with what actual communism was or is. The communism had its elites and whoever claims that people were or are equal under communism is just an ignorant. And, most importantly, communism in Soviet Union was just a brutal regime which silenced the opponents by killing or torturing them.







  • That is only sort of true - this image is not made of electrons reflected by the nuclei. These are results from TEM imaging, so Transmission Electron Microscopy. The electron detector is placed behind the sample.

    What you are describing is SEM - Scanning Electron Microscopy - in that case, the detector can be placed above the sample, for example (but not limited to) circularly around the beam to measure the backscattered electrons

    In TEM the samples are cut into very thin slices (in the picture you posted it is said to be between 0.8nm - 30nm) and the crystal lattice acts as a diffraction grating for the electron beam. The diffraction pattern can be then used to reconstruct the crystal lattice structure.