How the constrast is enhanced in an electron microscope ? Where the image is obtained ?

Explanation

### Step-by-Step Solution:

1. **Understanding the Electron Microscope**:
- An electron microscope is used to observe very small objects that cannot be seen with a light microscope. It uses a beam of electrons instead of light to create an image.

2. **Enhancing Contrast**:
- To enhance the contrast in an electron microscope, it is crucial to prepare ultra-thin and dry sections of the material being examined.
- These ultra-thin sections allow electrons to pass through more easily, which is essential for clear imaging.
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