Calculations with Optical Instruments



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Microscope

An optical microscope has two lense systems: at the top is the eyepiece, at the bottom is the objective. Between is the lens tube. By changing the lens tube length, the focus changes.


Magnification total:
Magnification objective:
Magnification eyepiece:


Mt = Mob * Mep


Magnification objective:
Lens tube length (cm):
Focal length objective (cm):


Mob = ltl / fob


Magnification eyepiece:
Focal length eyepiece (cm):


Mep = 25 cm / fep
See magnifying glass


Calculate magnification, focal length and lens tube length of a microscope.




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