What type of microscope is ideal for observing small structures like a virus?

• A. Light microscope
• B. Dissecting microscope
• C. Fluorescence microscope
• D. Electron microscope

Answer: (D)

Verified step by step guidance

1. Understand the limitations of light microscopes: Light microscopes use visible light to illuminate samples, which limits their resolution to about 200 nanometers. This is insufficient for observing viruses, which are typically much smaller.
2. Consider the dissecting microscope: Dissecting microscopes are designed for viewing larger, three-dimensional specimens at lower magnifications. They are not suitable for observing small structures like viruses.
3. Explore the capabilities of fluorescence microscopes: Fluorescence microscopes use fluorescent dyes to label specific components of a sample, allowing for enhanced contrast and visualization. However, their resolution is still limited by the wavelength of light used, making them unsuitable for direct observation of viruses.
4. Learn about electron microscopes: Electron microscopes use beams of electrons instead of light to achieve much higher resolutions, down to the nanometer scale. This makes them ideal for observing small structures like viruses.
5. Conclude with the ideal choice: Given the need for high resolution to observe viruses, the electron microscope is the most suitable option due to its ability to visualize structures at the nanometer level.