If the mounting medium is too thick, what happens to the transparency of the mounted section?

• A. It Decreases
• B. It Increases
• C. It Remains Unchanged
• D. It Fluctuates

Answer: (A)

The main idea is that optical clarity depends on a thin, uniform mounting medium. When the medium is too thick, light has to travel through more material and through additional interfaces, which increases scattering and refraction. Any tiny air pockets trapped in the excess medium can also scatter light, making the image appear hazier. The result is a noticeable decrease in transparency of the mounted section.