MICROSCOPE NOTES:

1.) Ocular Lens (Eyepiece) Magnifies objects 10x.
2.) Low-power Objective Lens Magnifies the image 10x or 4x
3.) High-power Objective Lens Magnifies the image 40x or 43x
4.) Nosepiece Holds the objectives & can be turned to change from one magnification to the other.
5.) Body Tube (Monocular Tube) Maintains the correct distance between the ocular lens & the objective lenses.
6.) Course Adjustment Knob Moves the Body Tube or Stage up & down to allow focusing of the image.
7.) Fine Adjustment Knob Moves the Body Tube or stage slightly, to bring the image into sharper focus.
8.) Stage Supports the slide with the specimen being viewed.
9.) Stage Clips Holds the slide in place for viewing.
10.) Diaphragm Controls the amount of light coming through the stage.
11.) Light Source Provides a light for viewing the specimen on the slide.
12.) Arm Supports the Body Tube.
13.) Base Supports the entire Microscope
14.) Magnification The ability to make an image appear larger (look bigger) than it really is.
15.) Powers of Magnification

Are written with the multiple of increased size with an "X". (10x = looks 10 times larger)
16.) Use of Compound Light Microscope

- Turn on Light Source.

- Turn Nosepiece to select desired Objective Lens. (It is best to select the lowest power lens 1st.)

- Look through Ocular Lens.

- Use Course Adjustment Knob to focus.
17.) Calculating Magnification for Compound Light Microscopes

= When using a Compound Light Microscope, the image being viewed is magnified by both the Ocular Lens & an Objective Lens.

- The product of the Magnification of the Ocular Lens & the Magnification for the Objective Lens gives you the Total Magnification for the image being viewed.
18.) Care & Maintenance of Microscopes

- Only use Lens Paper to Clean the Lenses! (Tissues, Paper Towels, etc... will scratch the lenses.)

- Always turn the Course Adjustment Knob Slowly! (So you don't break the microscopes, crack the lenses or crack the slides.)

- Be careful when rotating the Nosepiece, to change the Objective Lenses. (You may need to lower the stage 1st.)

- Always use 2 hands to carry Compound Microscopes. (1 hand on the arm & 1 hand on the base.)
19.) Compound Light Microscope Uses light with 2 or more lenses, to magnify an object.

20.) Simple Light Microscope

(Magnifying Glass & Hand Lens)

 Uses light & only 1 lens to magnify an object.
21.) What is an Electron Microscope? Uses a beam of electrons to magnify an object.