Microscope

Question 1

Arm

Answer 1

The part that connects the tube to the base.

Question 2

Base

Answer 2

The bottom support of the microscope

Question 3

Binocular Head

Answer 3

A microscope head with two eyepiece lenses - one for each eye. In a compound microscope there are two eyepieces but only one objective lens.

Question 4

Focusing Drive - Coarse Focus

Answer 4

The rough focus knob which moves the objective lens toward or away from the specimen.

Question 5

Condenser Lens

Answer 5

A lens mounted in or below the stage used to focus or condense the light onto the specimen - increases the illumination and resolution. (Collects the light from the illuminator and focus it on the specimen.)

Question 6

Iris Diaphragm

Answer 6

A five hole-disc with each hole having a different diameter. Used to control the amount of light that passes through the stage opening and helps to adjust both the contrast and resolution of a specimen.

Question 7

Eyepiece Lens

Answer 7

The lens at the top of the microscope that you look into. (usually 10x)

Question 8

Focusing Drive - Fine Focus

Answer 8

Knob used to fine tune the focus on the specimen - also used to focus on various parts of the specimen.

Question 9

Field of View

Answer 9

The diameter of the circle of light that you see when looking into a microscope. (As the power gets greater, the FOV gets smaller)

Question 10

Illuminator

Answer 10

A source light mounted under the stage

Question 11

Mechanical Stage

Answer 11

A flat surface where the slide with the specimen is placed. A mechanical way to move the slide around on your stage. It consists of two knobs - one moves toward or away from you and the other moves right or left.

Question 12

Objective Lens

Answer 12

The lens closest to the object responsible for magnifying the image of specimen.

Question 13

Pointer

Answer 13

Seen through the eyepiece of the microscope

Question 14

Eyepiece or Oculars

Answer 14

A magnifying lens attached to the microscope which helps in magnifying the sample object.

Question 15

Revolving Nosepiece

Answer 15

The part of the microscope which holds two or more objectives simultaneously to provide various magnifications in order to view the same specimen in various dimensions.

Question 16

Body/Binocular Tube

Answer 16

holds the eye piece and connects it to the objective.

Question 17

Contrast

Answer 17

The relationship between the luminance of an object and its background

Question 18

Magnification

Answer 18

ability to magnify a specimen - total magnification of a microscope is determined by multiplying the magnification capability of the eyepiece lens by that of the objective lens. (objective lens x ocular lens)

Question 19

Refraction

Answer 19

the bending of light as it passes from one substance to another.

Question 20

Resolution

Answer 20

the ability of a lens system to show fine details of the object being observed. (the ability of the lenses to distinguish two points)

Question 21

Focus

Answer 21

A means of moving the specimen closer or further away from the objective lens to render a sharp image.

Question 22

Refractive index

Answer 22

the light bending ability of a medium

Question 23

Immersion Oil

Answer 23

used to keep light from bending

Question 24

Depth of Field

Answer 24

The depth or thickness of the object space that is simultaneously in acceptable focus. The distance between the closest and farthest objects in focus within a scene as viewed by a lens at a particular focus and with given settings.