Question

What is the power objective used for?

1) Scanning
2) Oil immersion
3) Not mentioned
4) Cannot be determined

Answer 1

The power objective used for oil immersion increases the resolution and magnification of the image observed through a microscope.

Step-by-step explanation:

The power objective used for oil immersion is used to increase the resolution and magnification of the image observed through a microscope. Oil immersion lenses are typically used to study smaller objects, such as prokaryotic cells, as they provide a total magnification of 1000X with a resolution of 0.2 µm, allowing for greater clarity and detail of the image. Oil immersion solves the problem of compromised resolution at high magnifications by filling the space between the specimen and the lens with oil that has a refractive index similar to glass, thus increasing the light collected and enhancing the resolution of the image.

Answer 2

The power objective is used for 1) Scanning.

Step-by-step explanation:

In microscopy, the power objective refers to the lens or set of lenses closest to the specimen. The choice of power objective determines the level of magnification and resolution. Option 1, "Scanning," is a specific use of the power objective for obtaining a low magnification overview of the specimen. Scanning objectives typically have a lower magnification (e.g., 4x) and are employed for quickly surveying a large area. On the other hand, options 2 ("Oil immersion") and 3 ("Not mentioned") do not accurately describe the general purpose of the power objective. "Oil immersion" is a specialized technique involving the use of immersion oil to enhance resolution but is not the primary function of the power objective.

Option A (Scanning) is the answer.