Read Microscopes: Split Objective and Eyepiece Magnification
This short read prepares one exact NSEP pattern: compound microscope after tube-length change. Identify the physical condition before calculating.
Compound Microscope after Tube-Length Change is the central idea in this question pattern. Identify the condition in the stem before applying the method below.
Start with the physical model
Read the configuration once, state the conserved quantity or governing law, and mark any changing geometry, sign convention or limiting condition.
Build the relation
Increasing tube length by 2 cm, while readjusting the object so the final image remains at D, raises the objective image distance by 2 cm and gives mo,new≈10.33. Thus total magnification M≈10.33×6≈62.
Check before selecting
Check units, sign and one limiting case. A valid result must still fit the original geometry and stated constraint.
OlympIQ exam lens
- ✓Name the governing law before using a formula.
- ✓Keep the stated geometry and direction information explicit.
- ✓Use one unit or limiting-case check.
Changing the tube length changes the objective part; do not change the eyepiece factor if the final image condition is retained.
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