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An image supposedly showing Grains of salt under an electron microscope is frequently met with skepticism after it gets shared on social media: While these large blocks may not resemble table salt to the naked eye, this is a genuine image of grains of salt under a microscope. This image was taken at the Nanofabrication Facility at Western University in Ontario, Canada. It shows fine salt (french fry salt) at 150x magnification. It was originally posted on Flickr by ZEISS Microscopy in 2014 along with the following caption: The image can also be found on UWO Nanofabrication Facility's Tumblr page: Here's a similar image that was taken at UWO Nanofabrication Facility. Instead of fine salt, this image shows sugar: While these images genuinely show salt and sugar under a microscope, don't expect to get the same results with your home or school equipment. The images were produced with a high-powered (and expensive) scientific instrument called a FIB-SEM, or Focused Ion Beam Scanning Electron Microscope, that uses a focused beam of ions to scan and create 3D images. A paper published by eLifeSciences in 2017 explained: Focused Ion Beam Scanning Electron Microscopy (FIB-SEM) can automatically generate 3D images with superior z-axis resolution, yielding data that needs minimal image registration and related post-processing. Here's a video explaining more about the FIB-SEM:
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