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

•  ______- 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.