Question

Which are the part of compound microscope that control the intensity of light entering the viewing area?How?

Answer 1

Answer:

In a simple compound microscope found in school and college laboratories, a light source (known as illuminator) projects the light from the base of the microscope onto the sample. This light passes through an iris diaphragm (or just iris), which is a circular opening that controls the amount of light incident on the sample. This is a manual setting on the compound microscope and is set depending on the transparency of sample, level of contrast needed, etc.

Answer 2

Iris Diaphragm controls the amount of light reaching the specimen. It is located above the condenser and below the stage. Most high quality microscopes include an Abbe condenser with an iris diaphragm. Combined, they control both the focus and quantity of light applied to the specimen.