It was possible to view viruses only after the invention of the electron microscope because they are too small to be seen with a light microscope.

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Quizplus · Accepted Answer

Viruses are too small to be seen with a light microscope, which has a resolution of only about 0.2 micrometers. Electron microscopes, on the other hand, use beams of electrons to create higher-resolution images and can magnify objects up to 10 million times, making it possible to see viruses.

It Was Possible to View Viruses Only After the Invention