Parts of a Compound Microscope

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Questions and Answers

What is the function of the eyepiece or ocular lens?

  • To magnify the specimen (correct)
  • To provide a stable platform
  • To move the stage up or down
  • To hold the tube in place

What does the coarse adjustment knob do?

Moves the stage up or down to focus on the specimen.

What is the purpose of the fine adjustment knob?

To sharpen an image under low and medium power.

What is the revolving nosepiece used for?

<p>To select low, medium, or high power lens.</p> Signup and view all the answers

What are the magnifications of the objective lenses?

<p>4x, 10x, 40x (B)</p> Signup and view all the answers

Where is the stage located on a microscope?

<p>Where you place a slide for observation.</p> Signup and view all the answers

Stage clips are used to hold a slide in position on the stage.

<p>True (A)</p> Signup and view all the answers

What is the function of the diaphragm?

<p>To let different amounts of light pass through the specimen.</p> Signup and view all the answers

What does the lamp do in a microscope?

<p>Supplies light that passes through the specimen.</p> Signup and view all the answers

What is the function of the arm on a microscope?

<p>Holds the tube in place and is used to carry the microscope.</p> Signup and view all the answers

What does the base of a microscope provide?

<p>A stable platform.</p> Signup and view all the answers

What is the role of the tube in a microscope?

<p>Separates the ocular lens from the objective lenses.</p> Signup and view all the answers

Where are the condenser lenses located?

<p>Under the stage.</p> Signup and view all the answers

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Study Notes

Parts of a Compound Microscope

  • Eyepiece or Ocular Lens
    Magnifies the specimen usually by 10x; the lens you look through.

  • Coarse Adjustment Knob
    Moves the stage up or down to bring the specimen into focus; the first knob to be used for focusing.

  • Fine Adjustment Knob
    Sharpen images under low and medium power; essential for high power focusing.

  • Revolving Nosepiece
    Mounts the objective lenses; allows selection between low, medium, or high power lenses by rotation.

  • Objective Lenses
    Three lenses for magnification: Low (4x), Medium (10x), and High (40x).

  • Stage
    The flat platform where slides are placed for observation; should be kept dry.

  • Stage Clips
    Secure slides in position on the stage to prevent movement during observation.

  • Diaphragm
    Contains holes of varying sizes to control the amount of light passing through the specimen.

  • Lamp
    Provides light necessary for viewing specimens; microscopes without a lamp may use mirrors to reflect natural light.

  • Arm
    Holds the microscope's tube in place and serves as the handle for carrying the microscope.

  • Base
    Offers a stable support for the entire microscope structure.

  • Tube
    Separates the ocular lens from the objective lenses, ensuring proper distance for effective magnification.

  • Condenser Lenses
    Located beneath the stage, these lenses help concentrate light onto the specimen for better visibility.

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