Microscope Calculations

If the ocular is 10x and the objective is 20x, what is the total magnification?

• 14x

• 6x

• 200x

• 2.5x

If the total magnification is 100x and the objective is 10x, what is the ocular?

• 90x
• 10x
• 110x
• 1000x

Field of view is......

• The size of the specimen

• The size of the slide

• The diameter of the area you can see under the microscope

• The diameter of the area from which your specimen came

If the ocular is 2x and the objective is 4x, what is the total magnification?

• 8x
• 6x
• 2x
• 80x

Biologists use microns because millimeters are

• Too small to use for measurement

• Too big to use for measurement

• I have no idea what you're talking about man!

• none of the choices

How many microns/micrometers (µ) are in a millimeter (mm)?

• 10 µ

• 100 µ

• 1,000 µ

• 0.1 µ

Given information:

The field of view is 10 times larger in the 4x objective than the 40x objective.

Problem to solve:

If the field of view is 0.4 mm with the 40x objective, than what is the new field of view with the 4x objective?

• 4000 mm

• 400 mm

• 4.0 mm

• 40 mm

Here are the accurate field of views (fov) for the objectives:

scanning fov= 4.0mm

low power fov=1.5mm

high power fov=0.4mm

If 4 Amoebas can fit across the fov in high power, then what is the size of one amoeba in microns (micrometers)? (see visual on board or handout)

• 10,000 µ

• 10 µ

• 1000 µ

• 100 µ

Regulates the amount of light on the specimen

• Diaphragm
• Aperature
• Ocular Lens
• Objective Lenses

What will be the total magnification if the ocular lens is 10X and the objective lens is 40X?

• 40X
• 10X
• 100X
• 400X