Question

what does it mean to have parfocal objectives? a) the whole sample is in focus b) the sample remains in focus when the stage is moved laterally c) focusing on the sample is done automatically d) the sample remains in focus when the objectives are changed

Explanation:

Parfocal objectives in microscopy mean that when you change from one objective lens to another, the sample remains in focus without major re - focusing. This is a useful feature for quickly examining a sample at different magnifications.

Answer:

d) The sample remains in focus when the objectives are changed