What type of microscope is used to observe microorganisms that are in the nanometer range?

To observe microorganisms in the nanometer range, a transmission electron microscope (TEM) is typically used. TEM utilizes a beam of electrons that passes through a thin specimen, allowing for high-resolution imaging at the nanoscale. This type of microscope provides detailed structural information about the microorganisms, which cannot be achieved with light microscopes due to their limited resolution.