Powerful
How do really powerful microscopes and telescopes work?
A microscope that is powerful enough to see atoms isn’t just using a bunch of carefully ground lenses, is it? At what scale do lenses reach their limit, and some other method of detection take over? What is it?
The same goes for the most powerful telescopes. Is it all just great big lenses, or at some point are lenses replaced by some other technology? How do we see the most distant objects in space?
Firstly, Bored At Work is incorrect about lenses. Lenses can be used to focus any electromagnetic radiation; that is how Scanning Electron Microscopes (SEM) work.
Secondly, SEM’s do project fine beams of electrons toward the specimen. Without going into any detail on the subject, the electron beam interacts in a way with the specimen (based on atomic weights of the atoms in the sample) that can be digitized by detectors and produced into a picture.
Telescopes use detectors as well. Electromagnetic radiation from space strikes sensors that convert that radiation into electrical signals that can be converted into digital images. The radiation is comprised of many different energy particles that the detectors read. The detectors are energy specific so that only particular particles can affect the detector and provide a reading.
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