Examlex
The orbital period of the Moon with respect to a star (other than the Sun) is called a(n) ______________ month.
Ocular Lenses
The lenses closest to the eyes in a microscope, binoculars, or other optical instruments, enhancing the user's ability to see small details.
Compound Microscope
An optical instrument consisting of a series of lenses that magnify objects in steps; used for detailed observation of microorganisms and cells.
Substage Illuminator
A light source located beneath the stage of a microscope, used to illuminate the specimen from below.
Iris Diaphragm
An adjustable aperture used in optical instruments, like microscopes and cameras, to control the amount of light passing through the lens.
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