Parts and Functioning of a Compound Microscope: Magnification, Focusing, and Safety, Exams of Biology

Download Parts and Functioning of a Compound Microscope: Magnification, Focusing, and Safety and more Exams Biology in PDF only on Docsity!

Microscope

Cartoon

Eyepiece

Coarse Focus

Fine Focus

Objective Lenses

Stage Light Source

Stage Clips Arm

Base

Diaphragm

Parts of a compound microscope:

- Eyepiece – what you look into; contains a 10X lens - Objective lenses - three separate lenses that have different powers of magnification (4x, 10x, 40x)

- Light source - shines light through the slide - Diaphragm - controls the amount of light available - Arm – supports the eyepiece & objective lenses - Base – bottom of the microscope

Microscope Magnification

For Example

•If the eyepiece has a magnification of 10X and you are using the 4x objective lens, what is the total magnification? 10 x 4 = 40 This means the image you see through the eyepiece while using the 4x objective lens is 40 times larger than real life.

How to View a

Slide with a

Microscope Video

4. Set the microscope to the lowest power objective lens.( 4x )
5. Use the Coarse Focus Knob to bring the image into focus.
6. Change to a higher power objective lenses, if you want to zoom in. ( 10x then 40x )
7. Use the Fine Focus Knob to bring the image into focus.

Microscope Safety

•When using 4x objective,

use the coarse focus knob

•When using 10x and 40x

objectives, use ONLY the

fine focus knob so that you

don’t scratch a lens or break

a slide.