Field of View of a Microscope

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# Field of View of a Microscope - PowerPoint PPT Presentation

Field of View of a Microscope. Specimens are measured in microns (µm)! 1 millimeter = 1000 microns (micro meters). If this caterpillar is 20mm long, how many microns is it?. (20mm)(1000) = 20,000 microns. Which magnification will show more space, 40X or 100X?.

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## PowerPoint Slideshow about 'Field of View of a Microscope' - lyle-sosa

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Presentation Transcript

### Field of View of a Microscope

Specimens are measured in microns (µm)!

1 millimeter = 1000 microns (micro meters)

If this caterpillar is 20mm long, how many microns is it?

(20mm)(1000) = 20,000 microns

Ruler at 40X

How many mm across?

3mm

How many microns across?

3,000 µm

3 X 1000 = 3,000 µm across

Ruler at 100X
• How many millimeters? Microns?

High power magnification

Low power magnification

Low power diameter

High power diameter

=

400

40

3 mm

X

(40)(3mm) = (400)(X)

=

120mm = 400X

120mm

400

0.3mm

=

At 400X you only see 0.3 mm across

How many microns is that?

0.3mm X 1000 = ?

300 µm

Estimating the size of objects

If the field of view is 600 microns across, how far across is one specimen?

How many specimen can fit across?

If you can fit 6 across 600 microns, how far across is one circle?

Diameter / # of objects

600 microns/6 circles = 100 microns each

40X

100X

400X

40X

100X

400X