State the limitations of the electron microscope

An electron microscope has several limitations:

1. Sample Preparation: Samples often require extensive and complex preparation, which can introduce artifacts or alter the natural state of the specimen. This can include fixation, dehydration, embedding, and staining with heavy metals.
2. Vacuum Environment: Electron microscopes operate under a high vacuum, meaning that living or hydrated specimens cannot be directly observed. This limits the study of dynamic biological processes in their native state.
3. Cost and Complexity: Electron microscopes are very expensive to purchase, operate, and maintain. They also require specialized training to operate and interpret the images.
4. Image Interpretation: While electron microscopes provide high resolution, interpreting the resulting images can be challenging. Artifacts from sample preparation or the imaging process itself can be mistaken for real structures.
5. Limited Field of View: Although they offer high magnification, the field of view at any given time is very small, making it difficult to survey large areas of a sample quickly.