Microscope Oil-Immersion Objective
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Questions and Answers

Why is oil used on the slide when examining with the oil-immersion objective?

  • To decrease image sharpness for better observation
  • To protect the lens from dust particles on the slide
  • To reduce light refraction between air and glass (correct)
  • To increase the working distance between the lens and the slide
  • What is the purpose of using an oil-immersion objective when studying microbes?

  • To make the specimen appear larger than its actual size
  • To magnify the specimen without using any immersion medium
  • To clearly observe fine details of microbial morphology (correct)
  • To prevent image distortion due to excessive light refraction
  • Why should the body tube of the microscope not be lowered while looking through the ocular lens?

  • To maintain a specific working distance between the lens and the slide (correct)
  • To protect the slide from accidental staining
  • To increase the magnification level of the microscope
  • To prevent dust particles from entering the ocular lens
  • What does a high-power objective lens do to image quality in a microscope?

    <p>Improves image resolution by reducing light refraction</p> Signup and view all the answers

    Which component of a microscope is crucial for observing fine details in biological samples at high magnification?

    <p>Oil-immersion objective</p> Signup and view all the answers

    What happens to image quality if there is air between a high-power objective lens and a slide?

    <p>Image quality reduces due to excessive light bending</p> Signup and view all the answers

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