which part of the microscope controls the amount of light

Best Answer: The part called the diaphragm. It could be a plastic disk with various size holes from small to large. It could be an iris type with a lever to gradually open or close it.The field diaphragm.For me, the most important part is the light adjustment knob. It allows me to adjust the light where I can see my specimen, and I set it so that I can comfortably use the microscope without straining my eyes. If the knob was broken and the light was too bright, I definitely would not want to use it. I have noticed that many people dont worry with it and put their light at maximum causing them eye strain or headaches after some time.

A microscope is used to view small objects or features by magnifying them. A compound microscope, commonly found in laboratories, consists of an eyepiece (one or two lenses, for peering down), an objective (lens closer to the sample), a source of illumination (for illuminating the sample), and a stage (to hold the sample on a slide), among other parts. A number of light sources may be used, however a standard compound microscope uses an external…A compound microscope has two sets of lenses, the eyepiece lens and the objective lens. The sample to be studied is kept in a slide that is placed on a flat platform referred to as a stage. The system of lenses close to the slide is known as the objective and the one on top of the microscope is known as the eyepiece.To illuminate the sample being viewed it is possible to use a mirror that reflects light off an external source onto the slide. It is also possible to have an independent source of light that is used for illumination. An opening in the stage on which the slide is placed allows light to pass through it and light up the slide. It is possible to control the amount of light that shines through the slide by changing the size of the opening present in the stage. It is also possible to change the illumination by moving the mirror in microscopes that use one or by changing the brightness of the light source in the Illuminator.