Microscope

Question 1

Use to magnify the specimen w/ magnification of 10x

Answer 1

Eyepiece/Ocular lenses

Question 2

It connects the eyepiece and the head of a microscope. Holds the eyepiece in place.

Answer 2

Eyepiece tube

Question 3

It is attached to the nosepiece of the microscope, and w/ the magnification varying from 4x, 10x, 40x, 100x.

Answer 3

Objective lenses

Question 4

A structural part where it is use to carry the microscope. It connects the base to the nosepiece and the eyepiece of the microscopes.

Answer 4

Arm

Question 5

It holds the objective lenses in place, also it helps the objective lenses to rotate for you to choose which magnification level you want to use.

Answer 5

Nosepiece

Question 6

It holds the slide to prevent it from moving.

Answer 6

Clip holder/ Stage clips

Question 7

It is where the specimen is placed for observation. And also it has a hole in the middle, where the light to pass through the slide.

Answer 7

Stage

Question 8

Used to view the initial focus of the specimen, used w/ low power objective.

Answer 8

Coarse adjustment screw

Question 9

Used to view the final and clear focus of the specimen, used w/ high power objective.

Answer 9

Fine adjustment screw

Question 10

A whole in the stage where light can pass through.

Answer 10

Aperture

Question 11

The light source of the microscope. It reflect light from an external source up through the bottom of the stage.

Answer 11

Mirror/Illuminator

Question 12

Supports the microscope and it’s where illuminator is located.

Answer 12

Base

Question 13

Gathers and focuses light from the illuminator onto the specimen being viewed.

Answer 13

Condenser

Question 14

Adjusts the amount of light that reaches the specimen.

Answer 14

Diaphragm/ Iris

Question 15

These knobs move the stage left and right or up and down.

Answer 15

Stage control

Question 16

Useful as a means to change focus on one eyepiece so as to correct for any difference in vision between your two eyes.

Answer 16

Diopter adjustment

Question 17

The ‘‘father of microscopes’’ Dutchman, early 1670s

Answer 17

Anton van Leeuwenhoek

Question 18

Who (Dutch) experimented w/ a crude concept of microscope with magnification level of 10x to 30x or so, 1590.

Answer 18

Zaccharias Janssen and his son Hans

Question 19

Who (Italian) improved the principle of lenses and added a focusing device to improve somewhat upon what the Janssen’s had done.

Answer 19

Galileo

Question 20

Who was the first person to see and describe the bacteria, yeast, plants, and life in a drop of water with the magnification of up to 270x, 1674.

Answer 20

Anton van Leeuwenhoek

Question 21

High power microscopes

Answer 21

compound

Question 22

Low power microscopes

Answer 22

Stereo or dissecting

Question 23

High power microscopes can have a magnification level of?

Answer 23

40x to 1000x and some can go up to 1500x or 2000x.

Question 24

It is the most used light method. Light is projected from below to pass through the specimen.

Answer 24

Trans illumination

Question 25

Have a single light path that produce 2-D image of the specimen

Answer 25

Compound Microscopes

Question 26

There a two separate light paths that produce 3-D image of the specimen.

Answer 26

Stereo microscopes

Question 27

Uses the differences in the phases of light transmitted or reflected by a specimen to form distinct contrasting images of different parts of the specimen. Transparent and colourless images.

Answer 27

Phase Contrast

Question 28

The object viewed is illuminated by polarized light for typically analyzing the content and make-up of organic and inorganic material.

Answer 28

Polarizing

Question 29

Combination of a microscope and digital camera. Have high power level.

Answer 29

Digital

Question 30

New technology for a miniature and illuminator in one unit. Low power level.

Answer 30

Handheld digital Microscopes

Question 31

Uses a beam of accelerated electrons as a source of illumination. It has a high resolution of images of biological and non-biological specimens.

Answer 31

Electron Microscopes

Question 32

Used to view thin specimens which electrons can pass through a projection image used to image the interior of a cell.

Answer 32

Transmission electron microscope (TEM)

Question 33

Depends on the emission of secondary electrons from the surface of a specimen. Provide detailed images of the surface of the cell. Also used in particle counting, and size determination.

Answer 33

Scanning electron microscope (SEM)

Question 34

The number of times the image is larger than the object would appear to the naked eye.

Answer 34

Magnification (power)

Question 35

allows for brighter, sharper images combined with a wide field of view.

Answer 35

Low powers

Question 36

Often for examining slide specimens, present larger but dimmer images with a narrower field of view.

Answer 36

Higher powers

Question 37

When the magnification is increased but the detail is not (due to the limitation of the resolution), it is called?

Answer 37

Empty magnification

Question 38

A condition in which all optical elements are centered on the same axis.

Answer 38

Collimation (Alignment)