Microscopes and Their Uses

Which microscope is used to see internal structures of cells in a natural state?

group of answer choices:

1. Electron microscope

2. Fluorescence microscope

3. Compound light microscope

4. Darkfield microscope

5. Phase-contrast microscope

Answer:

Phase-contrast microscope is used to see internal structures of cells in a natural state.

Phase-contrast microscope is a type of microscope that allows the visualization of living cells in their natural state with high contrast and high resolution. It is specifically designed to observe internal structures of cells without the need for staining or fixing the specimens.

When we look at the other options:

1. Electron microscope: Used to examine whole cells and sub-cellular structures with high magnification.

2. Fluorescence microscope: Utilized to image samples that fluoresce under certain wavelengths of light.

3. Compound light microscope: Passes visible light through the specimen to see magnified images.

4. Darkfield microscope: Illuminates specimens against a dark background for enhanced contrast.

Through the phase-contrast microscope, we can observe living cells and organelles by enhancing the light contrast between different densities of the sample parts. This makes it a valuable tool in biological research and medical diagnostics.