Microscope Flashcards
When was the first compound microscope?
1590
He used a compound microscope to observe pores in cork.
Robert Hooke
He is the one who termed the word cells.
Robert Hooke
He is the 1st to see single-celled organisms.
Antoine Van Leeuwenhoek
Antoine Van Leeuwenhoek found single-celled organisms in _____.
Water
First microscope, and is most widely used.
Compound light microscope
It can have one or two lens.
Compound light microscope
Compound light has around what magnification?
2000x
Used to observe VERY small objects: viruses, DNA, parts of cells.
Electron microscope
It uses beams of electrons instead of light.
Electron microscope
It is more powerful than compound light microscope.
Electron microscope
Can magnify up to 100,000x (type of electron microscope).
Scanning Electron Microscope (SEM)
Can magnify up to 250,000x (type of electron microscope).
Transmission Electron Microscope (TEM)
These are the metal parts of the microscope.
Mechanical Parts
The “foot” of the microscope (acts as a support). This may be U, V, or Y in shape.
Base
It connects the base to the other parts of the microscope.
Pillar
This is the point where a screw is placed at the pillar’s side for tilting the microscopes.
Inclination Joint
The platform attached to the lower portion of the arm. The specimen is placed in this area.
Stage
The curved structure that connects the lower and upper parts of the microscope. It also serves as the microscope’s handle.
Arm
It is a big cylindrical structure which allows a considerable distance between the lenses of the ocular or eyepiece and objectives.
Body Tube
This is a smaller tube which holds the eyepiece or ocular lens.
Draw Tube
This is the circular structure attached to the area below the body tube that protects the objectives from dust.
Dust Shield
This is the bigger wheel at one side of the arm.
Coarse Adjustment Screw/Knob
This is used to move the body tube up & down.
Coarse Adjustment Screw/Knob
The screw is also used to focus the general image of the object under the LPO.
Coarse Adjustment Screw/Knob
This is the smaller screw at one side of the arm.
Fine Adjustment Screw/Knob
It is used to focus the detailed portion of the object under the HPO.
Fine Adjustment Screw/Knob
These are the magnifying parts of the microscope bearing the lenses.
Optical Parts
This is the lens found at the opening of the draw tube. This magnifies the secondary image of the object.
Eyepiece/Ocular
Its magnification varies from 5x - 15x.
Eyepiece/Ocular
These magnify the primary image of the specimen/object.
Objectives
With 4x - 10x, the object is seen in its general view.
Low Power Objective (LPO)
This has greater magnification than the LPO, varying from 45x - 60x. This gives more detailed magnification or image.
High Power Objective (HPO)
Magnification varies from 90x - 100x, giving a more detailed image than the HPO.
Oil Immersion Objective (OIO)
This is used when examining bacteria or microorganisms. This uses a special oil (like cedar wood oil).
Oil Immersion Objective (OIO)
This is attached to the pillar by the mirror fork, and is seen below the stage.
Mirror
Used with daylight illumination (high intensity light).
Plane/Flat Mirror
Uses artificial light (low intensity light).
Concave Surface
Iris diaphragm and abbe condenser are parts of the?
Substage
This regulates the amount of light to obtain a clearer view of the object. This is a round structure beneath the stage.
Iris Diaphragm
It is provided with a protruding metal which can be moved to increase/decrease the opening’s diameter.
Iris Diaphragm
In other types of microscope, the iris diaphragm is not present; rather, it is substituted by a circular disc with several openings called _____ _________.
Wheel Diaphragm
This is a lens system which concentrate light rays upon the object.
Abbe Condenser
Increase of an object’s apparent size.
Magnification (x)
Power to show details clearly.
Resolution
