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stage opening
The answer to this microscope question is the stage opening.
Diffraction. Bending of light/sound as it moves from one medium to another - Refraction.
refraction and diffraction refraction is when light passes through it bends but diffraction is that light finds an opening to pass through while other waves bounce off
The spinal cord passes through the opening in the cervical vertebrae C1-C7.
pupil
The Iris
The small opening of the iris in the eye is the pupil.
The Iris
The opening in the iris is called the AQUEOUS HUMOUR. :] /according to other websites\ hope it helped; had a hard time finding my answer too. xD
the iris
The iris has an opening, called the pupil, through which light enters the eye.
Light passes through the cornea, the aqueous humor, the pupil (which is just an opening in the iris), the lens, and the vitreous humor on its path through the eye to the retina.
The pupil.
The pupil is the opening in the iris. The iris controls the amount of light entering the eye.
the colored part of the human eye the controls how much light passes through the pupil is calles the
the iris diaphragm controls the amount of light that passes through the stage and, consequently, through the specimen. Reducing the iris diaphragm aperture increases contrast for an image focused under high power by reducing the amount of light that both fills the objective lens and deracts around specimen edges. Opening the iris diaphragm under high magnification increases "flare", the appearance of light "washing out" an object. By decreasing the flow of light through the specimen, the iris diaphragm limits light defraction and saturation.