Microscopes

Question 0

Total magnification

Answer 0

The enlarged size of the object verses it’s actual size when viewed using both ocular and objective lenses

Question 1

Objective lenses

Answer 1

The 4 different lenses used to view the object in 4 different magnifications. 40x 200x, 400x, 600x

Question 2

Magnification of ocular lense

Answer 2

10x

Question 3

Magnification of scanning power lens

Answer 3

4x

Question 4

Magnification of low power lens

Answer 4

20x

Question 5

Magnification of medium power lens

Answer 5

40x

Question 6

Magnification of high power lens

Answer 6

60x

Question 7

Scanning power total magnification

Answer 7

40x

Question 8

Low power total magnification

Answer 8

200x

Question 9

Medium power total magnification

Answer 9

400x

Question 10

High power total magnification

Answer 10

600x

Question 11

The microscopes used in class are parfocal meaning…

Answer 11

As you change the objective lenses, the object will remain mostly in focus

Question 12

Resolution

Answer 12

How clear an image of an object appears.

Question 13

Contrast

Answer 13

Determining different parts of the object

Question 14

Field of view

Answer 14

The area that can be seen with the microscope

Question 15

Orientation

Answer 15

The image of the object is the result of mirrors, causing the image to be a mirror image of the object.

Question 16

First thing you do before getting a microscope…

Answer 16

Clear a space in your work area

Question 17

When carrying a microscope…

Answer 17

Always use two hands. Support the arm with one hand, and the base with the other hand

Question 18

What is the only acceptable thing to clean a lens with?

Answer 18

Lens paper

Question 19

Always start on what power when using a microscope..

Answer 19

Scanning power

Question 20

What power should the microscope be on when you put it away?

Answer 20

Scanning power

Question 21

Never use coarse adjustment knob when?

Answer 21

When using medium and high power

Question 22

You may use which microscope

Answer 22

Only your assigned one #18

Question 23

Which objective lens will give you the largest field of view?

Answer 23

Scanning objective lens

Question 24

Which objective lens do you always start viewing an object with?

Answer 24

Scanning objective lens

Question 25

Which objective lenses do you use the fine focus knob with?

Answer 25

Medium and high power objective lens. Because lenses are very close to the slides.

Question 26

Revolving nosepiece

Answer 26

The objective lenses are attached to the nose peice. Which allows you to change the objective lens in use. Rotate the nosepiece slowly, you will hear and feel a click when it is correctly in place

Question 27

Arm

Answer 27

The part to hold when carrying a microscope

Question 28

Base

Answer 28

Other hand is placed under the base when carrying, this part rests on the table

Question 29

Coarse adjustment focus knob

Answer 29

A large knob on either side of the microscope. Used to move the stage up and down, to position the object in focus. This knob should be used only when the microscope is on the scanning or low power objective lenses

Question 30

Fine adjustment focus knob

Answer 30

The smaller knob projecting out of the coarse adjustment knob. Makes very slight changes, used to bring the image of an object into sharp focus. Used on medium and high power objective lenses

Question 31

Stage

Answer 31

The place where the slide is placed for viewing. There is a hole in the stage; the object to be viewed should be placed directly over the hole to allow light to shine through the object.

Question 32

Stage clips and knobs

Answer 32

The metal clips holds the slide into place, and allow the slide to be moved easily to position or reposition an object

Question 33

Condenser

Answer 33

The condenser focuses light

Question 34

Iris diaphragm

Answer 34

This is located immediately under the stage. By moving this lever to the right or left, you can adjust the amt. of light that passes through the specimen and therefore the contrast

Question 35

Light source

Answer 35

Comes from the base of the microscope, shines upward to illuminate an object

Question 36

Reastat

Answer 36

Controls light. Little wheel. Needs to be turned away (all the way down) before putting the microscope back

Question 37

Total magnification is figured out how?

Answer 37

Total mag.= ocular mag x object. mag

Question 38

Pointer

Answer 38

The little needle that points to structures in the magnified image.

Question 39

When viewing an object you should record what?

Answer 39

The total magnification