Microscopy Fundamentals Quiz
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Questions and Answers

What was a significant problem with early compound microscopes?

  • They were too heavy to handle.
  • They had too few lenses.
  • They could only magnify up to 5x.
  • They produced blurry images with halos of light. (correct)

What advancement improved the detail visible through microscopes in the 18th century?

  • The addition of a built-in camera.
  • The introduction of a digital display.
  • The use of mirrors instead of lenses.
  • The development of an achromatic lens. (correct)

How is magnification calculated using a microscope?

  • Power of objective lens × power of eyepiece (correct)
  • Power of eyepiece ÷ power of objective lens
  • Power of eyepiece + power of objective lens
  • Power of objective lens - power of eyepiece

What magnification results from a 2.5x low-power objective lens and a 10x eyepiece?

<p>25x (A)</p> Signup and view all the answers

Which of the following statements is true about Van Leeuwenhoek's contributions to microscopy?

<p>He was known for his high-quality lenses. (C)</p> Signup and view all the answers

What significant publication did Robert Hooke release in 1665?

<p>Micrographia (C)</p> Signup and view all the answers

What was the magnification power of the microscope invented by the Janssens?

<p>20x (A)</p> Signup and view all the answers

How did Hooke illuminate his microscope for observations?

<p>Through a water-filled glass flask (C)</p> Signup and view all the answers

What was among the properties of cork that Hooke noted?

<p>It was lightweight and compressible (A)</p> Signup and view all the answers

Flashcards

Magnification

The ability to enlarge the image of an object.

Achromatic Lens

A type of lens that reduces chromatic aberration, improving image clarity by minimizing color distortion.

Total Magnification

The product of the magnification powers of the objective lens and the eyepiece.

Compound Microscope

A type of microscope with two lenses: the eyepiece and the objective lens.

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Blurry Images in Early Microscopes

Early microscopes often produced blurry images with halos of light due to light scattering.

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Microscopy

The process of observing and understanding living organisms through the use of magnifying tools like microscopes.

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Janssen Microscope

The first compound microscope, invented around 1595, used two lenses to produce a magnified image. Its magnification was limited to about 20x.

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Ocular lens

The lens closest to the eye, used to view the magnified image.

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Objective lens

The lens closest to the specimen, producing the initial magnification.

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Robert Hooke

An English scientist who made significant contributions to microscopy, publishing "Micrographia", a book containing illustrations of microscopic observations.

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Cell

The basic unit of life, observed by Hooke in thin slices of cork, appearing as empty chambers.

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Hypothetico-deductive method

An approach to scientific inquiry that involves forming a hypothesis and then designing an experiment to test it.

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