The in-focus thickness of a specimen viewed under a microscope is called the ________.

A) field of view
B) resolution
C) focal plane
D) depth of field

Focal Plane

The specific distance at which the lens of a camera or microscope focuses light to form a sharp image.

Depth of Field

The range of distance within a photograph that appears acceptably sharp, influenced by the aperture, focal length, and distance from the subject.

Resolution

The process of reducing or separating something into its components or the clarity and detail of an image.