Microbiology: Abundance and Diversity of Microbes
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Questions and Answers

What is the primary function of the condenser adjustment and centering screw?

  • To close or open the iris diaphragm
  • To adjust the condenser and center it in relation to the objective (correct)
  • To focus the objective lens
  • To move the mechanical stage forward and backward

    • What is the function of the iris diaphragm lever?

  • To focus the objective lens
  • To adjust the condenser
  • To move the mechanical stage left or right
  • To close or open the diaphragm (correct)

    • How many sets of lenses are used in a microscope?

  • Three sets
  • One set
  • Two sets (correct)
  • Four sets

    • What is the first step in using a microscope?

    <p>Mount the specimen on the stage</p> Signup and view all the answers

    What should be done to the condenser when using a low power objective lens?

    <p>Adjust it to the lowest position</p> Signup and view all the answers

    What is the working distance when using a ×10 objective lens?

    <p>5.0 – 6.0 mm</p> Signup and view all the answers

    How should the iris diaphragm be adjusted when using a high power objective lens?

    <p>Half open</p> Signup and view all the answers

    What should be done to the objective lens when using a high power objective lens?

    <p>Raise it to get a clear image</p> Signup and view all the answers

    What is the purpose of the coarse adjustment screw?

    <p>To focus the objective lens</p> Signup and view all the answers

    What should be done to the illumination light when using a high power objective lens?

    <p>Decrease the light intensity</p> Signup and view all the answers

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