Microscope and its Parts

Question 1

What are the parts of a microscope?

Answer 1

Eyepiece, body tube, arm, objective lenses, revolving nose piece, stage, stage clips, coarse focus knob, fine focus knob, diaphragm, light source, and the base.

Question 2

Eyepiece

Answer 2

• holds the lens and magnifies

Question 3

Body tube

Answer 3

• holds the lens at a certain distance from the lower lens
• transmits light from the specimen to the eye

Question 4

Arm

Answer 4

• supports the body tube

Question 5

Objective lenses

Answer 5

• contains lenses for magnification

Question 6

Revolving nose piece

Answer 6

• rotating devise that holds the objective lenses

Question 7

Stage

Answer 7

• supports the slide

Question 8

Stage clips

Answer 8

• holds the slide in place

Question 9

Coarse focus knob

Answer 9

• moves the stage up and down
• used to obtain the initial focus on low power
• never used on high power

Question 10

Fine focus knob

Answer 10

• moves the stage up and down but only slightly
  used after obtaining an image with the coarse focus knob

Question 11

Diaphragm

Answer 11

• an adjustable opening under the stage that allows different amounts of light onto the stage

Question 12

Light source

Answer 12

• provides light for the microscope

Question 13

Base

Answer 13

• supports the microscope

Question 14

What are the steps for using a microscope?

Answer 14

1. Place the slide onto the stage
2. Ensure that the lowest power objective lens is selected
3. Adjust the coarse focus
4. Twist the revolving nose piece to switch to the high-power objective lens
5. Adjust the fine focus
6. Use the fine focus knob again if necessary to focus the image

Question 15

How do you calculate the total magnification?

Answer 15

eye piece lens X x magnification lens X
e.g. 4X x 5X = 20X