Download MICROSCOPES SLIDE SHOW NOTES

MICROSCOPES SLIDE SHOW NOTES
What is a Microscope?
• An ___________________ instrument used for producing a ____________________image
of a small object.
Did You Know . . . ?
• The microscope is the most important tool for biologists.
• The first cells were seen in ____________________.
The Beginnings
• Of the five senses, the most important is ____________________.
– Aids in the process of gathering information about the environment that we
are part of.
– The amount of detail that it can provide is severely limited.
• In order to overcome those limitations, humans started to develop instruments like
the __________________ glass, the spectacles, the telescope and the ________________.
Founding Fathers of Microscopy
• Credit for the first microscope is usually given to____________________, around the
year 1595.
• The first compound microscopes produced by the Janssen’s were simply a
____________________ with lenses at each end.
• ____________________ remarkable engineering abilities enabled him to invent and
improve many mechanical devices, including timepieces and the Gregorian
telescope.
• In 1665, he coined the word ____________________ to describe the features of
plant tissue (cork from bark of an oak tree).
• ____________________ made simple (one lens) microscopes.
• He was the first person to describe ____________________ (from teeth
scrapings) and ____________________ (from pond water).
Compound Light Microscope
• Compound
– Deals with the microscope having ____________________ than one lens.
• Light
– The method by which light transmits the ____________________ to your eye.
• Microscope
– “Micro” =
– “Scope” =
Terminology
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•
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•
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____________________ - Lens closest to the specimen.
____________________ - Lens you look through.
____________________ - The total power of the microscope.
____________________ - The amount of detail you can see in an image.
____________________ - The point at which the light from a lens comes together.
How Does it Work?
• Microscopes take an image of something generally too small to see with the naked
eye and magnify that image so that the observer can see it in greater detail.
• To magnify images, a microscope uses several lenses to change the angle at which
rays of light strike the eye of the observer.
Microscope Care & Handling
• Transporting • Handling • Cleaning • Storage -
Using the Microscope - Before You Start
• Place the microscope on a table with the arm ____________________ you about a fist’s
length from the edge of the table.
• The microscope should be on the ____________________ power objective and the
stage should be all the way ____________________.
• The diaphragm should be set on the ____________________ field of view.
- First Focusing
• Place a slide on the stage centering the specimen over the stage ___________________.
• Use the stage clips to hold the slide in place.
• Looking through the ____________________, slowly turn the ____________________
adjustment knob until the specimen comes into focus.
- Switching Objectives
• Look at the microscope from the ____________________.
• Carefully revolve the nosepiece until the ____________________-power objective lens
clicks into place. Make sure the lens does not hit the slide.
• Looking through the eyepiece, use the ____________________ adjustment knob until
the specimen comes into focus.