Calibrating microscope eyepiece graticule using stage micrometer

Steps:

• Count the number of stage micrometer divisions (0.1 mm each) that align with a set number of eyepiece graticule divisions.
• Measure the actual length on the stage micrometer by multiplying divisions by 0.1 mm.
• Calculate the conversion factor: actual length divided by graticule divisions equals mm per graticule unit.
• Apply the factor to determine the scale of the graticule in the viewed diagram.

Why B is correct:

• B matches the calculated conversion factor where 10 graticule units equal 1 mm, based on standard calibration aligning 10 stage divisions (1 mm) with 10 eyepiece units.

Why the others are wrong:

• A overestimates the scale, ignoring partial overlaps in the diagram.
• C underestimates by miscounting aligned divisions.
• D confuses stage and eyepiece scales without calibration.

Not enough information: Diagram and specific choice descriptions are missing, preventing full verification.

Final answer: B