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hillier and albert prebus, of canada, and v. k. zworykin, of the united states also made notable contributions to its development. the scanning electron microscope, introduced in , gains even greater resolution by reading the response of the subject material rather than the direct reflection of its beam
. using a similar approach, optical scanning microscopes achieve a resolution of angstroms, less than the wavelength of the light being used. finally, the scanning tunnelling microscope, invented in , uses not a beam but an electron wave field, which by interacting with a nearby specimen is capable of...
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