TOPIC: Microscope AIM: How is a specimen viewed with a microscope measured?

Micrometers Microns µm = um 1mm = 1000µm What unit is used to measure cells? Micrometers Microns µm = um 1mm = 1000µm

Paper thickness = about 150 µm

Human hair diameter = 80-100 µm

SHRIMP EGGS

Multiply by 1000 or simply move the decimal 3 places to the right. mm  µm

Example: 3.2 mm = ? 3. 2 0 0 3200.0 µm

0.7634mm = ? µm 0. 7 6 3 4  763.4 µm

Move the decimal three places to the left or divide by 1,000 µm mm Move the decimal three places to the left or divide by 1,000

Example: 789 µm = ? mm 7 8 9 .  0.789 mm

53.6 µm = ? mm 0 5 3. 6  0.0536 mm

Smaller to larger = move decimal to left um  mm Larger to smaller = move decimal to the right mm um

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Microscopic Measurement

1. 1mm 3.25mm = Field of view = 3250 µm

2. 500um 1000/2 = 500 1mm = 1000um

3. 1000um 2000/2 = 1000 2 mm = 2000um

4. 1000/2 = 500 500um 250um 500/2 = 250 1000um

5. 1000um 2000/2 = 1000 500um 1000/2 = 500 2000um

6. 500um 250um 125um 1000um

7. 2500um 1250um 625um 5mm = 5000um

8. 1000um 5000/5 = 1000 5mm = 5000um

9. 1000um 7000/7 = 1000 7000um

10. 400um 2000/5 = 400 2000um