The document describes the components and functions of a microscope, an optical instrument used for magnifying small objects. Key parts include the eyepiece, body tube, revolving nosepiece, stage, adjustment knobs, and light source. It emphasizes the role of objective lenses in enhancing magnification and the usage of various knobs and diaphragms for focusing and lighting the specimen.

16. Microscope
• An optical instrument that uses a lens or a
combination of lenses to produce magnified
images of small objects, especially of objects
too small to be seen by the unaided eye.

17. • Arm- Supports the tube and connects it to the
base
• Base- The bottom of the microscope, used for
support
• Eyepiece- Where you look to see the image of
your specimen.

18. Arm
Base

19. • Body tube- Connects the eyepiece to the
objective lenses.
• Revolving Nosepiece- This is the part that
holds two or more objective lenses and can be
rotated to easily change power.
• Stage- The flat platform where you place your
slides.

20. Body tube
Revolving
Nosepiec
e
Stage

21. • Fine Adjustment Knob-small, round knob on
the side of the microscope used to fine-tune
the focus of your specimen
• Coarse Adjustment Knob--large, round knob
on the side of the microscope used for
focusing the specimen.
• Stage Clips-hold the slide in place

22. Coarse
Adjustment Knob
Fine Adjustment
Knob
Stage Clips

23. • Iris Diaphragm- controls the light going
thorough the aperture.
• Mirror/Light source-used to reflect light to the
specimen/source of light.
• Objective lenses-may have (scanner, Low, high
Oil immersion objectives) and is used use to
increase the magnification of the specimen.

24. Iris Diaphragm
Light Source