Microscope: A Window to the Invisible World

What is the function of an objective lens in a microscope?

The objective lens is an essential part of a microscope as it plays a crucial role in magnifying the specimen. How does the objective lens work in a microscope?

Answer:

The objective lens in a microscope is responsible for magnifying the specimen that is being viewed. By adjusting the objective lens, you can change the magnification power and observe the specimen at different levels of detail.

In a compound microscope, which is commonly used in laboratories and educational settings, the objective lens is located closest to the specimen. The objective lens is typically equipped with multiple magnification powers, ranging from low (e.g., 4x) to high (e.g., 100x). By rotating the turret to switch between the objective lenses, you can change the magnification power and observe the specimen at different levels of detail.

When light passes through the objective lens, it converges onto the specimen, creating a magnified image that is viewed through the eyepiece. The magnification power of the objective lens determines how much larger the specimen will appear compared to the naked eye.

For example, using a 10x objective lens will make the specimen appear 10 times larger than its actual size. On the other hand, using a 40x objective lens will magnify the specimen 40 times its original size, allowing you to observe fine details that may not be visible at lower magnifications.

Overall, the objective lens in a microscope serves the critical function of magnifying the specimen, enabling scientists, researchers, and students to explore the intricate and hidden world of microscopic organisms and structures.