Microscope Calculations Quiz

If each division is 100 µm, what is the size of this organism?

• 4 µm
• 400 µm
• 4,000 µm
• 400 mm

Doris observed that 8 Smallus Bugus' fit across the field of view, which was calculated to be 1,600 µm.  What is the size of one Smallus Bugus?

• 8 µm
• 1,600 µm
• 200 µm
• 12,800 µm

The ________ of the microscope would show you the SMALLEST field of view.

• low power objective
• medium power objective
• high power objective
• ocular

Find the total magnification: 
Eyepiece = 10X 
Objective lens = 55X  

• 10x
• 55x
• 65x
• 550x

Here are the settings on a microscope:

Low Power Objective Lens: 4x

Medium Power Objective Lens: 20x

This image shows the field of view under low power (in millimeters) = 4 mm

Calculate the field of view that would appear on medium power.

• 800 µm

• 600 µm

• 900 µm

• 400 µm

Field of view is......

• The size of the specimen
• The size of the slide
• The area you can see under the microscope
• The area from which your specimen came

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

• 10 µ
• 100 µ
• 1,000 µ
• 0.1 µ

The know field of view is 2.5 mm and an objective of 4x. What is the new field of view if you increase the objective to 40x?

• 0.25 mm

• 25 mm

• 250 mm

• 10 mm

If the know field of view with an ocular of 5x and an objective of 10x is 5,000 µ, what is the new field of view if the objective is increased to 20x?

• 10,000 µ
• 2,000 µ
• 625 µ
• 2,500 µ

The field of view is 675 μm and a baby starfish ray (leg) takes up 3/4 of you view.  What is the average size of one starfish ray?

• 2,700 μm
• 169 μm
• 900 μm
• 506 μm