Parts of Microscope

Question 1

Ocular Lens (eyepiece)

Answer 1

Magnify object

Question 2

Body Tube

Answer 2

Holds eyepiece and objective lenses from each other

Question 3

Revolving Nosepiece

Answer 3

Rotating disk that holds 2+ objective lenses

Question 4

Objective lens(es)

Answer 4

Magnify object (every lens has different power

Question 5

Arm

Answer 5

Connects base and tube.

Question 6

Stage

Answer 6

Supports microscope slide

Question 7

Stage Clips

Answer 7

Hold slide in position. Allows light to pass through in the center

Question 8

Light source

Answer 8

Source that illuminates the specimen

Question 9

Condenser Lens

Answer 9

Directs light to object being viewed

Question 10

Diaphragm

Answer 10

Controls amount of light reaching object being viewed

Question 11

Coarse Adjustment Knob

Answer 11

Moves tube vertically to bring object to focus

Question 12

Fine Adjustment Knob

Answer 12

Brings object into sharper focus

Question 13

Types of Objective Lens

Answer 13

Low Power [4X]
Medium Power [10X]
High Power [40X]

Question 14

Calculate Total Magnification

Answer 14

Total Magnification = Ocular Lens X Objective Lens

Example: 10X • 4X = 40X

Question 15

Diameter Field of View (dFOV)

Answer 15

Diameter of what you see through the lens in a microscope

Question 16

Calculate dFOV

Answer 16

Transparent ruler on stage and measure under LOW power

Question 17

Relationship between dPOV and details

Answer 17

As dPOV decreases,
Detail increases
From low to high power

Question 18

Magnification equation

Answer 18

dFOV (1) x total magnification (1) = dFOV (2) x total magnification (2)

Question 19

Calculate object size

Answer 19

Object size = dPOV(μm)/number of times object fits across dFOV