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Questions and Answers

What does the ocular lens do?

  • Magnifies the image by 10x (correct)
  • Adjusts the amount of light
  • Magnifies the image by 4x
  • Connects to the base

What connects the ocular lens to the objective lenses?

Body tube

Which part of the microscope should be held when carrying it?

Arm

The coarse adjustment knob should be used at high power.

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

What is the function of the fine adjustment?

<p>Exact focusing under higher power</p> Signup and view all the answers

What holds the objective lens and allows for magnification change?

<p>Rotating/revolving nosepiece</p> Signup and view all the answers

What is the magnification of the low power objective lens?

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

What is the total magnification if the ocular lens magnification is 10x and the objective lens magnification is 40x?

<p>400x (B)</p> Signup and view all the answers

Where is the stage located on a microscope?

<p>Below the objective lenses</p> Signup and view all the answers

What holds the slides in place on the stage?

<p>Stage clips</p> Signup and view all the answers

What adjusts the amount of light reaching the specimen on a microscope?

<p>Diaphragm</p> Signup and view all the answers

What part of the microscope supports its weight?

<p>Base</p> Signup and view all the answers

What functions as a light source in a microscope?

<p>Light source/illuminator</p> Signup and view all the answers

What is the role of the condenser lens?

<p>Focuses light through the stage</p> Signup and view all the answers

How should you carry a microscope?

<p>By the arm with the other hand supporting the base</p> Signup and view all the answers

Who is known as the father of microscopy?

<p>Anton van Leeuwenhoek</p> Signup and view all the answers

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Study Notes

Microscope Parts and Functions

  • Ocular Lens: Eyepiece that magnifies the image 10x as projected by the objective lens.
  • Body Tube: Connects the ocular lens to objective lenses, ensuring proper alignment of light from specimen to viewer's eye.
  • Arm: Supports the body tube and connects to the base; important for safe handling of the microscope.
  • Coarse Adjustment Knob: Used first for major focus adjustments under low power; improper for high power use.
  • Fine Adjustment: Provides precise focusing under high power; essential for clear viewing of details.
  • Rotating/Revolving Nosepiece: Holds objective lenses; can rotate to change magnification easily.
  • Objective Lenses: Includes low, medium, and high power lenses for varying magnification levels—adjustable system.
  • Low Power Lens: Lowest magnification at 4x, ideal for initial viewing of specimens.
  • Medium Power Lens: Offers medium magnification of 10x, useful for detailed examination.
  • High Power Lens: Highest magnification at 40x, designed for viewing fine details in specimens.
  • Stage: Platform for slides with a hole to allow light to illuminate the specimen from below.
  • Stage Clips: Secure slides in place on the stage to prevent movement during observation.
  • Diaphragm: Rotating dial adjusts light intensity reaching the specimen; crucial for optimal visibility.
  • Base: Provides stability and support for the microscope; houses the light source and electronics.
  • Light Source/Illuminator: An electric light or mirror that directs light upwards towards the specimen.
  • Condenser Lens: Focuses light from the illuminator through the stage’s hole onto the specimen for better clarity.
  • Proper Carrying Technique: Always support the microscope by the arm while holding the base with the other hand.
  • Anton van Leeuwenhoek: Recognized as the father of microscopy; discovered bacteria using simple microscopes.
  • Total Magnification Formula: Calculated by multiplying the magnification of the ocular lens by the magnification of the objective lens.

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