Microscope Parts & Uses

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Questions and Answers

What does the term 'micro' in microscope refer to?

  • To make large
  • To change color
  • To see small (correct)
  • To view an object

Which statement accurately describes the function of a microscope?

  • To create reflected images of large objects
  • To analyze chemical properties of materials
  • To magnify objects for better visibility (correct)
  • To illuminate objects with lasers

What processes do the different parts of a microscope facilitate?

  • Changing the color of the sample
  • Performing chemical reactions on samples
  • Magnifying and clarifying images (correct)
  • Infrared imaging of samples

What is true about the structures that can be examined with a microscope?

<p>They can be very small and not visible without magnification (C)</p> Signup and view all the answers

What combination of words forms the term 'microscope'?

<p>Micro and scope (B)</p> Signup and view all the answers

What is a common use for the light microscope in the laboratory?

<p>Diagnosis and study of microscopic organisms (B)</p> Signup and view all the answers

Why is the light microscope referred to as a compound microscope?

<p>It contains two types of lenses that magnify an object (C)</p> Signup and view all the answers

Which components primarily contribute to the functioning of a compound microscope?

<p>Two types of lenses (B)</p> Signup and view all the answers

What is NOT a typical feature of a light microscope?

<p>Use of electron beams for imaging (A)</p> Signup and view all the answers

In what scenario would a light microscope be most appropriately used?

<p>For observing the cellular structure of bacteria (D)</p> Signup and view all the answers

What is the function of the eyepiece in a light microscope?

<p>To provide magnification of the specimen for viewing (A)</p> Signup and view all the answers

Which part of the light microscope connects the eyepiece to the objectives?

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

How many objective lenses are typically found in a compound light microscope?

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

What is the purpose of the nosepiece in a light microscope?

<p>To hold and rotate the objective lenses (D)</p> Signup and view all the answers

Which of the following is NOT an objective lens found in a compound light microscope?

<p>Reflecting lens (D)</p> Signup and view all the answers

What is the lowest magnification power of the objective lenses in a compound light microscope?

<p>4X (B)</p> Signup and view all the answers

What is the total magnification achieved if the eyepiece magnification is 10× and the objective lens magnification is 4×?

<p>40× (A)</p> Signup and view all the answers

Which part of the microscope is primarily responsible for supporting the body tube?

<p>Arm (B)</p> Signup and view all the answers

What is the primary function of the coarse adjustment knob in a microscope?

<p>To raise or lower the stage for initial focusing (C)</p> Signup and view all the answers

In a microscope, what is the purpose of the fine adjustment knob?

<p>To clear the focus after coarse adjustment (A)</p> Signup and view all the answers

Where is the specimen slide placed for viewing in a microscope?

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

If a microscope has an ocular lens that magnifies 10 times and an objective lens that magnifies 100 times, what is the total magnification?

<p>1000× (D)</p> Signup and view all the answers

Flashcards

Microscope

An instrument magnifying very small objects invisible to the naked eye by using lenses and light.

Objective lens

The part that magnifies the object under observation.

Eyepiece

The lens closest to your eye, which further magnifies the image from the objective lens.

Stage

A platform where the specimen to be viewed is placed.

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Illuminator

A mirror or light source that illuminates the specimen.

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Light Microscope

A type of microscope that uses visible light to illuminate and magnify a specimen.

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Compound Microscope

A microscope that uses two or more lenses to magnify an object.

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Light Microscope

A type of microscope that uses visible light and a series of lenses to magnify a specimen. It is commonly used in laboratories for diagnostic purposes.

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Microscopic Organisms

The tiny organisms that are too small to be seen with the naked eye and can only be viewed with a microscope.

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Microscopic Study

The process of using a microscope to examine the structure of biological specimens.

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Body Tube

The long tube connecting the eyepiece to the objectives. It holds the lenses in alignment.

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Nosepiece

The rotating part at the bottom of the body tube that holds the objective lenses.

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Scanning Lens (4X)

The lowest magnification lens. Often used to initially locate and focus on the specimen.

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Low-Power Lens (10X)

The lens used for general viewing and provides a moderate level of magnification.

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Microscope arm

The part of the microscope that is attached to the foot and supports the body tube.

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Coarse adjustment knob

A round knob on the side of the microscope used for focusing the specimen; it may move either the stage or the upper part of the microscope.

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Fine adjustment knob

A small, round knob on the side of the microscope used to fine-tune the focus after using the coarse adjustment knob.

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Total Magnification

The magnification of the eyepiece multiplied by the magnification of the objective lens.

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Study Notes

Microscope Parts & Uses

  • A microscope is an instrument that uses visible light and magnifying lenses to examine small objects
  • The word "microscope" combines "micro" (small) and "scope" (view)
  • Light microscopes are used in laboratories for diagnosing and studying microscopic organisms
  • A compound light microscope has two types of lenses that magnify an object:
    • Eyepiece: the lens closest to the eye
    • Objective: the lens closest to the specimen
  • Total magnification is calculated by multiplying the magnification of the eyepiece by the magnification of the objective lens
  • Eyepiece: Used for looking through to see the image of the specimen
  • Body tube: A long tube that holds the eyepiece and connects it to the objectives
  • Nosepiece: Rotates to change the objective lenses
  • Objective lenses: Come in different magnifications:
    • Scanning (4X)
    • Low-power (10X)
    • High-power (40X)
    • Oil-immersion (100X)
  • Stage: Large, flat area where the specimen slide is placed
  • Stage clips: Hold the slide in place on the stage
  • Aperture: A hole in the stage that allows light through for viewing
  • Condenser: Collects, controls, and concentrates light from the lamp to the specimen
  • Diaphragm control: Regulates the amount of light passing through the aperture
  • Light source: Usually located at the base of the microscope; makes the specimen easier to see
  • Coarse Adjustment Knob: Large knob used to initially focus the specimen
  • Fine Adjustment Knob: Small knob for precise focusing after using the coarse adjustment knob
  • Arm: Supports the body tube and is attached to the foot
  • Base: Supports the entire microscope
  • Microscope uses: Botanical, biological, crime investigation, educational, and medical fields

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