Want this question answered?
Regulates the amount of light entering the body tube...
Equipped on the Condenser of the microscope, the iris diaphragm is a shutter controlled by a lever that is used to regulate the amount of light entering the lens system.
"meteors"
The light diaphragm
The amount of light that is directed from the bottom of an optical microscope through a specimen can be increased by using a stronger bulb or light source. A potentiometer can be used to dim or increase the strength of the light source.
Iris controls the amount of light entering into the eye.
the diaphragm controls the amount of light entering the microscope
The iris!
The biconcave structure is the "lens, but his focuses the light, it does not adjust for the amount of light. The structure that adjusts for the amount of light entering the eye is the "iris"
The iris controls the size of the pupil. Which in turn, controls the amount of light entering the eye.
It has different sized holes and is used to vary the intensity and size of the cone of light that is projected into the slide
The pupil is the opening in the iris. The iris controls the amount of light entering the eye.
The pupil goes larger in the dark, and smaller in the light.
The diaphragm is a circular disk that adjusts the amount of light entering the stage area.
The pupil is a hole that allows light into the eye.
The pupil. However, as it is a hole, i.e. an absence of anything it seems odd to say it controls anything. The iris controls the size of the pupil and therefore the amount of light entering.
It is called the iris. The part of a camera that serves the same purpose is also called an iris, or a diaphram. http://en.wikipedia.org/wiki/Iris_(anatomy)