1. Magnifying Glass Magnify What does magnify mean?
-to make a small object
look larger
Does it make the object larger?
NO, just look larger

2. Magnifying Glass What is are the structures on a magnifying glass?
-a lens and a handle to hold
lens
handle

3. Magnifying Glass What is the function of a magnifying glass?
-to make a small object
look larger by bending
light through a single lens

4. Microscope Notes

5. Microscopes Microscope—a tool that makes small objects look larger
Two kinds of microscopes:
Simple microscopes use one lens
Compound microscopes use two or more lenses.

6. Magnification
- to make things look larger than they are

7. The lenses magnify an object by bending light to make the object look larger.

8. Kinds of Compound Microscopes
Mirror microscopes
Light microscopes

9. Microscopes have 2 or more convex lenses:
Compound
Microscopes have 2 or more convex lenses:
1 lens eyepiece
eyepiece
near the top
where you
put your eye
2nd lens objective lens
objective lens
closest to the object
you are looking at

10. Which is better?
not so good
better
best
resolution
Resolution
means the ability to clearly distinguish the individual parts (of an object); is another term for the sharpness of an image

11. Microscope Micro = small, tiny scope = to see or
instrument for viewing
Greek: “mikros” small “skopein” to look
Put these together and you get:
an instrument for viewing small, tiny objects

12. Microscopes make a specimen look bigger.
The specimen is the tiny object that you are looking at under the microscope.
Magnification
Microscopes make a specimen look bigger.
The magnification tells you how many times bigger an object looks. 2x
Two times
bigger 3x
Three times
bigger
actual
size

13. Calculating the Total Magnification
of the
Eyepiece
Magnification
of the
Objective
Lens
Total Magnification x =
Ex:
10x 4x
40x
Multiplied by
Equals
Now create an example of your own.
*Remember to multiply the 2 numbers.

14. Coarse adjustment knob: makes rough, large adjustments to focus the specimen.
Use this knob when first looking
for the specimen.
Underline “Coarse” and review that coarse means rough. Underline “rough, large”.

15. Fine adjustment knob: makes tiny, small adjustments to focus the specimen.
Use this knob for fine, precise
focusing (fine tuning).
Underline “Fine” and think of fine tuning Underline “small, tiny”.