Slowly turn the fine focus knob until the cells are in focus and visible.
An optical instrument is used to magnify several hundred times very small objects, such as mineral samples or animal or plant cells.
How does the microscope work?
The first magnification is produced by reflecting light from a mirror up through the specimen or object to be viewed into the powerful objective lens. The image created by the objective lens is magnified again by the eyepiece lens, which functions as a simple magnifying glass.
What are the parts of the microscope?
- Ocular or eyepiece: This is what you see at the top of the microscope.
- Tube for the eyepiece: Maintains the eyepiece's position.
- The objective lens: The primary optical lenses on a microscope with magnification powers ranging from 4x to 100x.
- Focusing knobs: They assist in focusing the microscope.
- Stage: This is a ledge where the specimen will be observed.
- Performance clips: Clips on the stage that holds, for example, a glass slide on which the specimen is mounted.
- Aperture: The hole in the stage through which transmitted light from the base reaches an observation specimen placed on the stage.
- Luminaire: This is the light source for a microscope, which is usually located in the microscope's base.
- Condenser: Is used to collect and focus the illuminator's light on the specimen. It is located directly beneath the stage.
- The diaphragm of the iris: This is a flexible structure located above the condenser and below the stage that controls the amount of light reaching the specimen.
- Focusing knob condenser: Controls the light focus on the specimen by moving the condenser up and down.
- Base: This is the microscope's foot, which supports the entire frame.
Thus, we can conclude that by the focus knob students can focus on slides.
You can learn more about microscopes here:
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