Your lab microscope is "parfocal." what does this mean?
a - the specimen is clearly is focus at this depth.
b - the slide should be almost in focus when changing to higher magnifications
c - you can easily discriminate two close objects as separate

The correct answer is that the specimen is clearly is focus at this depth.

Explanation:

A 'parfocal' microscope has the specimen to be viewed in focus, and easily viewed from the angles of several lenses positionally directed on it.

Thus, you NEED NOT move the specimen or slide to have the best view.

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