1. what is the function of the iris diaphragm and where is it found on a microscope? controls width (diameter) of light circle on specimen. found under that microscope stage that holds the slide. controls the intensity of light shining on the specimen. found on the arm of the microscope controls the amount of light passing through the specimen. found between the objective lenses and the ocular lenses. controls the focus of the light from the lamp on the specimen. found on the lamp.

Controls the amount of light passing through the specimen. Found between the objective lenses and the ocular lenses.

Explanation:

The diaphragm, is the part of the microscope that works like in a camera, is an opening that regulates the quantity of light that passes through the specimen, and this is useful because in this way the specimen can be easily seen some structures like certain organelles.

It is localized normally in the base, between the light source and the sample, so it can regulate the quantity of light.

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