Answer;
-Viruses are too small to be seen in a light microscope, however viruses can be seen with an electron microscope with 100,000x magnification
Explanation;
-Viruses are considerably smaller, as they are merely nucleic acid surrounded by a protein shell as opposed to an entire living cell. Viruses typically range from 20-400 nm, meaning one needs an electron microscope to see them.
Bacteria are over 100 times larger than viruses, but both can still only be seen by using a microscope. However, bacteria can be seen through a light microscope while virus can not. (since the maximum magnification of a light microscope is x1500 which is not enough to view a virus).