Question

which of these factors is improved by adding immersion oil when using the 100x objective?
a) resolution
b) magnification
c) transparency
d) contrast

Explanation:

Immersion oil has a refractive index similar to that of glass. When used with a 100X objective, it reduces light refraction at the air - glass interface, allowing more light to enter the objective lens. This increases the resolving power, enabling the visualization of finer details. Magnification is determined by the lens system and not directly by immersion oil. Transparency is a property of the specimen and not improved by immersion oil. Contrast is related to differences in light absorption and reflection within the specimen and is not enhanced by immersion oil.

Answer:

A. Resolution