A virus is 50 nm in size so would you recommend using a stereo compound light microscope or an electron to see it?

An electron microscope would be recommended to view a virus. Although a stereo compound light microscope can provide magnified images, it is limited in resolution and would not be able to provide sufficient magnification to see a virus, which is only 50 nm in size. In contrast, an electron microscope uses a beam of electrons instead of light, allowing for much higher magnification and resolution, making it suitable for observing objects at the nanoscale level, such as viruses.