Compound microscope (standard approximation) (M ≈ −(vo/uo)(1 + D/fe))
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M ≈ −(vo/uo)(1 + D/fe)
What each symbol means
| Symbol | What it stands for |
|---|---|
| D | Least distance of distinct vision |
| M | Total magnification (compound microscope, standard form) |
| f_e | Focal length of eyepiece (m) |
| u_o | Object distance for objective (m) |
| v_o | Image distance for objective (m) |
When to use this
Standard JEE / NCERT assumptions unless stated (paraxial, thin lens, coherent YDSE sources, etc.).