Quiz #2

 1. stage clips- metal strips that can hold the specimen slide in place
 2. fine adjustment (knob)-the knob used to focus the quality of the image of the specimen
 3. ocular lens (eyepiece)- the lens located in the eyepiece and the part used to look through the microscope(standard magnification of 10x)
 4. base- the bottom and support of the microscope- holds and can move the objective lenses- the section where the specimen is placed for viewing
 5. high powered objective- the objective lens that multiplies the magnification by the highest power on the microscope
 6. low powered objective- the objective lens that multiplies the magnification by the lowest power on the microscope
 7. diaphragm- controls the amount of light that reaches the specimen
 8. stage- the section where the specimen is placed for viewing
 9. coarse adjustment (knob)- the knob used to quickly focus the microscope

  1. arm- the part of the microscope connecting the base to the head and the eyepiece
  2. (revolving) nosepiece- holds and can move the objective lenses
  3. light source- typically located in the base and illuminates the specimen
  4. body tube- connects the ocular lens to the objective lenses
  5. What is the main difference between a simple microscope and a compound microscope?

    A simple microscope only employs a concave mirror, while a compound microscope employs a plane mirror on one side and a concave mirror at the other.

  1. List and describe the uses for three different kinds of microscopes.2.

    1. light microscope- used to view objects too small to see with the naked eye by using visible light

    2. electron microscope- used to magnify an object's image by using a beam of electrons

    3. scanning probe microscope- used to provide surface images at up to atomic scale and other valuable high resolution data

  1. Why does a drop of water act as a magnifying glass?

    A drop of water's surface curves outward to make a dome. This outward curvature bends light rays inward. The result is an enlarged image.

  1. Name the two Dutch spectacle makers that developed the first microscope.

    Hans and Zacharias Janssen

  1. What happened to George Stiernhielm, when he looked at fleas under a magnifying lens?

    The image appeared larger. A clergyman pronounced him as an atheist after seeing his discovery.A simple microscope only employs a concave mirror, while a compound microscope employs a plane mirror on one sideand a concave mirror at the other