Microscopes and Medical Imaging

📋 Course Outline

1. Light Microscope Principles
2. Magnification and Image Appearance
3. Electron Microscope Types
4. Medical Imaging Technologies

📖 1. Light Microscope Principles

🔑 Key Concepts & Definitions

• Light microscope: uses light and glass lenses to magnify objects, allows light to pass through the specimen, and can be used to view living or preserved specimens
• Phase-contrast microscope: is a light microscope that enhances contrast and is useful for examining living, unstained cells

📝 Essential Points

• Stains are often used to make specimens easier to view with a light microscope.

• Light microscopes provide magnification up to 1500 times.

💡 Memory Hook

Light microscopes use light and glass lenses, whereas electron microscopes use electrons.

📖 2. Magnification and Image Appearance

📐 Formula — Total magnification equals the magnification of the ocular lens multiplied by the magnification of the objective lens: $M = M_{ocular} \times M_{objective}$.

📐 Formula — Magnification equals drawing size divided by actual size: $M = \frac{I}{A}$.

• The metric scale relationships are 1 meter = 100 centimeters = 1000 millimeters = 1 × 10^6 micrometers = 1 × 10^9 nanometers.