Via its mechanically controlled Iris.
mirrors ;)
compound light microscope - cell theory - electron microscope
The light microscope uses visible light. Light microscopes are what are usually used in science classrooms.
compound light microscope
An electron microscope has a much higher magnifying power and resolution than a regular light microscope. One can visualize molecules and even atoms using an electron microscope. This is not possible with a light microscope
you can control it to adjust the amount of light
mirrors ;)
Diaphragm control lever
The adjustable stage opening on a microscope is used to control the amount of light illuminating the specimen.
gather light, control angle of illumination
Iris diaphragm
compound light microscope - cell theory - electron microscope
The light microscope uses visible light. Light microscopes are what are usually used in science classrooms.
The light microscope use the visible light; the electron microscope use an electrons beam.
A compound microscope
A light microscope
It