GENERAL HISTOLOGY

Detailed explanation-1: -The iris diaphram is an adjustable shutter which allows you to adjust the amount of light passing through the condenser. The angle determines the Numerical Aperture (NA) of the condenser. This diaphragm, generally called the aperture diaphragm, is one of the most important controls on the microscope.

Detailed explanation-2: -An iris diaphragm is an adjustable assembly of thin metal leaves for varying the size of openings that determine the cross section of the light ray bundle entering the condenser and the objectives. Light Source-usually located in the base of the microscope.

Detailed explanation-3: -IRIS DIAPHRAGM CONTROL-A lever (or rotating disk) that adjusts the amount of light illuminating the slide. Use just enough light to illuminate the object on the slide and give good contrast.

Detailed explanation-4: -Answer and Explanation: The part of a microscope that is able to control and allow the maximum amount of light to pass through the slide is known as the diaphragm. The diaphragm can open and close allowing more or less light to enter the scope illuminating the object being magnified.