Microscope Parts

Question 1

ocular lens (eyepiece)

Answer 1

topmost series of lenses through which an object is viewed

the eye lenses

Question 2

body tube (head)

Answer 2

holds nosepiece at one end and eyepiece at the other end: conducts light rays

Question 3

objective lens

Answer 3

three lenses at the end of the body tube

each one has a different magnification

Question 4

scanning objective lens: magnification and field of view diameter

Answer 4

4x (total magnification = 40X)
5 mm (5000 um

Question 5

low power objective lens

Answer 5

10x (total magnification = 100x)
2 mm (2000 um)

Question 6

high power objective lens

Answer 6

40x (total magnification = 400x)

0.5 mm (500 um)

Question 7

arm

Answer 7

supports upper parts and provides a carrying handle. the power switch and rheostat are found on this part

Question 8

nosepiece

Answer 8

rotating part of the microscope to which the objective lenses are attached

Question 9

stage

Answer 9

holds and supports microscope slides. a mechanical stage clip is attached to the top surface that allows precision movement of the slide

Question 10

mechanical stage clip

Answer 10

the left part of the clip is spring-loaded and swings outward to the left to allow you to place a slide into the clip and gently presses against the left edge of the slide to hold it in the clip while viewing.

Question 11

mechanical stage adjustment knobs

Answer 11

two knobs hang down from one side of this mechanism that allow you to precisely move the slide around on the stage to search for objects to view

Question 12

coarse focus adjustment knob

Answer 12

knob used to bring object into approximate focus when using the scanning objective lens only

Question 13

fine focus adjustment knob

Answer 13

knob used to make small focus adjustments when using the low power or high power objective lenses

Question 14

condenser

Answer 14

a lens mounted in an enclosure underneath the stage. concentrates light passing through the viewed object and into the objective lens

Question 15

iris diaphragm lever

Answer 15

this is the lever in front of the condenser housing. it slides from side to side and controls the amount of light passing through the condenser by changing the size of the hold in the iris diaphragm mounted inside the condenser housing

Question 16

light source

Answer 16

an attached lamp that directs a beam of light up through the object

Question 17

power switch

Answer 17

located on the front corner of the base. the symbol “l” means “On” and the symbol “O” means “Off”

Question 18

rheostat

Answer 18

a rotating dial on the side of the microscope’s arm. controls the intensity of the light by working like a dimmer

Question 19

base

Answer 19

the bottom part of the microscope that supports all of the major parts. the light source is found on this part