Summary
Microscopy involves using microscopes to magnify objects for detailed examination. Microscope — a device that enlarges an object's picture for detailed examination. Example: Used to study cell structures. Light Microscope — small, portable, and can observe living specimens with magnification up to x2000. Example: Used for simple cell observations. Electron Microscope — large, requires a vacuum, and can only observe dead specimens with magnification up to x500,000. Example: Used for detailed cellular structures. Magnification — how much larger a sample appears under a microscope compared to its actual size. Example: Calculated using the formula magnification = size of image / actual size of specimen. Resolution — the ability to distinguish between two separate points. Example: Higher resolution provides clearer images. Dry Mount — a slide preparation technique for solid specimens. Example: Hair or plant tissue. Wet Mount — a slide preparation technique for wet specimens. Example: Aquatic samples. Squash Slides — a slide preparation technique for soft specimens. Example: Root cells. Smear Slides — a slide preparation technique for bodily fluids. Example: Blood smears.
Exam Tips
Key Definitions to Remember
- Microscope
- Light Microscope
- Electron Microscope
- Magnification
- Resolution
Common Confusions
- Confusing magnification with resolution
- Misunderstanding the differences between light and electron microscopes
Typical Exam Questions
- What is the magnification of a microscope if the image size is 0.19 mm and the actual size is 1.9 μm? Magnification = size of image / actual size of specimen
- Which slide preparation technique involves suspending a specimen in water? Wet Mount
- How do you calculate the actual size of a specimen if the magnification is x2000 and the image size is 1.5 cm? Actual size = Image size / Magnification
What Examiners Usually Test
- Understanding of different types of microscopes and their uses
- Ability to perform magnification and actual size calculations
- Knowledge of slide preparation techniques and their applications