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Questions and Answers
What is the primary function of the nosepiece on a microscope?
What is the primary function of the nosepiece on a microscope?
- To control the amount of light
- To hold the slide in place
- To support the microscope during transport
- To allow the rotation of different objective lenses (correct)
The stage of a microscope is the part that controls the amount of light that passes through.
The stage of a microscope is the part that controls the amount of light that passes through.
False (B)
What are the Greek roots of the word 'microscope'?
What are the Greek roots of the word 'microscope'?
Mikros (small) and Skopein (to look at)
The __________ is used for quick initial focusing on a microscope.
The __________ is used for quick initial focusing on a microscope.
Match the parts of the microscope with their functions:
Match the parts of the microscope with their functions:
Which of the following parts of the microscope is similar to an eye in function?
Which of the following parts of the microscope is similar to an eye in function?
The coarse adjustment knob is used for fine tuning the focus of a microscope.
The coarse adjustment knob is used for fine tuning the focus of a microscope.
What primary insight did microscopes allow scientists to achieve?
What primary insight did microscopes allow scientists to achieve?
Who created one of the earliest compound microscopes in 1600?
Who created one of the earliest compound microscopes in 1600?
The light source is used to provide illumination for the microscope.
The light source is used to provide illumination for the microscope.
What did Robert Hook publish that included copper-plate illustrations?
What did Robert Hook publish that included copper-plate illustrations?
The _____ knob is used to move the stage closer slowly for precise focus.
The _____ knob is used to move the stage closer slowly for precise focus.
Match the following parts of the microscope with their functions:
Match the following parts of the microscope with their functions:
Which objective lens is commonly used for high-power observation?
Which objective lens is commonly used for high-power observation?
Antonie Van Leeuwenhoek is known for creating compound microscopes.
Antonie Van Leeuwenhoek is known for creating compound microscopes.
What is the main component of a compound light microscope?
What is the main component of a compound light microscope?
The _____ provides a square-shaped support for transporting the microscope.
The _____ provides a square-shaped support for transporting the microscope.
Which of these lenses is used for observing extremely small specimens with oil?
Which of these lenses is used for observing extremely small specimens with oil?
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Study Notes
Microscope Basics
- The term "microscope" is derived from Greek: "mikros" means small, and "skopein" means to look at.
- Microscopes are key instruments for viewing small objects, allowing significant advancements in understanding body and diseases.
Notable Figures in Microscopy
- Zacharias Janssen: Created one of the earliest compound microscopes around 1600.
- Antonie Van Leeuwenhoek: Developed simple microscopes, using his own lenses to observe microorganisms like animal cells, blood, and sperm.
- Robert Hooke: Authored "Micrographia", highlighted the structure of cork, and coined the term "cell" for the basic living unit.
Parts of a Microscope
- Evolving Nosepiece: Circular mechanism enabling rotation between different objective lenses.
- Arm: Facilitates safe transportation of the microscope.
- Stage: Flat surface under the objective lens, where slides are placed.
- Iris Diaphragm: Functions like a pupil to control light passage under the stage.
- Coarse Adjustment Knob: Used for initial, quick focusing on specimens.
- Fine Adjustment Knob: Moves the stage slowly for precise focusing.
- Light Source: Illuminates the specimen for better visibility.
- Base: Provides sturdy support for the microscope.
Objective Lenses and Magnification
- Scanning Lens (4x): Used for preliminary location of specimens.
- Low Power Lens (10x): Useful for viewing specimens that don't require high magnification.
- High Power Lenses (40x, 43x, 45x): 40x is common; higher powers offer detailed views without oil.
- Oil Immersion Lens (100x): Intended for observing extremely small specimens, such as bacteria; requires cedar wood oil for optimal function.
Main Component of Microscope
- Compound Light Microscope: Utilizes multiple lenses to magnify objects by bending or refracting light, enhancing the viewing experience of small details.
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