Viruses are so small that they can be seen only with an electron microscope, and viruses Viruses are very small, a few nanometers in size. Given these facts, objects that are a few nanometers in size can be seen only with: among the following options:
- an electron microscope
 - refraction of light
 - matter vibrating
 - ultrasound
 - The bending of a ray of light
 - slight magnification
 - flashlights
 - lens


 

 an electron microscope        