1: Light Microscopes and Drawing Skills

Question 1

Draw and label a light microscope. (p4)

Answer 1

1. eye piece
2. nose piece
3. objective lens
4. stage
5. condenser lens and diaphragm
6. coarse focusing knob
7. fine focusing knob
8. lamp

Question 2

There are 11 steps to follow when using light microscopes. If you can be fucked to learn them good for you, but I can’t.

Answer 2

It starts like this:

1. treat the specimen with a stain that makes parts of the cells of the specimen available….

Question 3

Why were microscopes invented?

Answer 3

1. to investigate the structure of cells and tissues

Question 4

What has a higher capacity for magnification: a light microscope or an electron microscope?

Answer 4

1. an electron microscope gives a higher magnification

Question 5

What do you call a photograph taken down a microscope? How else could you record what you see?

Answer 5

1. a micrograph

2. by drawing it

Question 6

How to calculate magnification of a micrograph or drawing.

Answer 6

1. magnifcation = size of image / size of specimen

make sure your units are the same when you divide

Question 7

What is a scale bar?

Answer 7

1. a line added to a micrograph or a drawing to help to show the actual size of the structure

Question 8

What is the relationship between millimeters (mm), micrometers (um) and nanometers (nm)?

Answer 8

1 mm
= 1,000 um
= 1,000,000 nm

Question 9

A micrometer (um) is the smallest S.I size unit you will see on a scale bar. True/False?

Answer 9

1. False

2. a nanometer (nm) is x1000 smaller than a micrometer