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LBBBIOA > THE COMPOUND MICROSCOPE > Flashcards

THE COMPOUND MICROSCOPE Flashcards

1
Q

indispensable tool

enables us to see plant structures too small to be seen by the unaided eye

A

microscope

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2
Q

three elements are needed to form an image

A

a source of illumination

the specimen to be observed

a system of lenses to focus the illumination on the specimen and to form the image

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3
Q

microscope that uses natural or artificial light and series of lenses

A

compound light microscope

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4
Q

series of lenses in compound light microscope (4)

A

condenser
objectives
intermediate lenses
ocular lens

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5
Q

magnifies and projects virtual image into the body tube

A

objective lens

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6
Q

while the _____ magnifies that image further and projects the enlarged image into the eye

A

ocular lens

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7
Q

three basic parts of the microscope

A

(a) mechanical parts
(b) magnifying parts
(c) illuminating parts

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8
Q

those parts concerned with the support and adjustment of the optical parts

A

Mechanical Parts

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9
Q

Mechanical Parts (11)

A
  1. Base
  2. Pillar
  3. Handle or Arm
  4. Inclination Screw
  5. Body Tube
  6. Ocular Tube
  7. Revolving Nosepiece
  8. Dust Shield
  9. Adjustment Screws
    a. Coarse Adjustment Screw
    b. Fine Adjustment Screw
  10. Stage
  11. Mirror Rack
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10
Q

those parts concerned with image enlargement of the specimen

A

Magnifying Parts

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11
Q

Magnifying Parts (2)

A
  1. Ocular or Eyepiece
  2. Objectives
    a. Scanner
    b.Low Power Objective (LPO)
    c. High Power Objective (HPO)
    d. Oil Immersion Objective
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12
Q

those parts concerned with light provision and regulation to the specimen

A

Illuminating Parts

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13
Q

those parts concerned with light provision and regulation to the specimen

A

Illuminating Parts

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14
Q

Illuminating Parts (3)

A
  1. Mirror
  2. Diaphragm
  3. Condenser
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15
Q

stand that supports the microscope.

A

Base

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16
Q

a short piece of metal that attaches to one end of the base; also supports the microscope.

A

Pillar

17
Q

curved metallic part arising from the pillar used for holding the microscope

A

arm or handle

18
Q

found at the junction of the pillar and the handle used for tilting the microscope

A

Inclination Screw

19
Q

cylindrical structure vertically arising from the handle; holds the dust shield and nosepiece

A

Body Tube

20
Q

upper smaller end of the body tube bearing the eyepiece or ocular lens.

A

Ocular Tube or Draw Tube

21
Q

circular structure where the objectives are attached that permits the shifting of objectives

A

Revolving Nosepiece

22
Q

circular structure above the nosepiece used to protect the lenses of the objectives

A

Dust Shield

23
Q

two pairs of wheels attached to either side of the body tube.

A

Adjustment Screws

24
Q

used to adjust the low power objective in focusing

A

Coarse Adjustment Screw

25
Q

used for delicate focusing in connection with the high power and oil immersion objectives

A

Fine Adjustment Screw

26
Q

A square or round platform with an opening at the center where the slide is placed

A

Stage

27
Q

A square or round platform with an opening at the center where the slide is placed

A

Mirror Rack

28
Q

found on the draw tube through which the operator peeps during actual focusing; usually carries magnification of 10X

A

Ocular or Eyepiece

29
Q

A thin, black line that appears to cut halfway across the field of view which the student or instructor can use to point out regions of the specimen under observation

A

pointer

30
Q

tube-like structures attached to the revolving nosepiece

A

objective

31
Q

a. Scanner
b.Low Power Objective (LPO)
c. High Power Objective (HPO)
d. Oil Immersion Objective

A

carries a magnification of 4-5X.
carries a magnification of 10-12X.
carries a magnification of 40-60X.
carries a magnification of 97-100x; requires the use of cedar oil.

32
Q

found below the stage near the base used to collect and direct light to the specimen.

A

Mirror

33
Q

found below the stage used to regulate the entry of light onto the specimen. There are different types of diaphragm: iris, plate or fan

A

Diaphragm

34
Q

lens found immediately beneath the hole of the stage used to concentrate light rays on the specimen

A

Condenser

LBBBIOA (18 decks)

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