Lab Home

Compound Microscope

Ray Optics Simulator
Object Distance (u)
30 mm
Distance from object to objective
Objective fo
10 mm
Short → high magnification
Eyepiece fe
30 mm
Eyepiece acts as magnifier
Tube Length L
150 mm
Distance between lenses
⚠ Object is inside or at the objective focal point — no real intermediate image forms. Move the object further from the objective lens.
Objective Magnification (M₁)
v₁ / u — inverted real image
Eyepiece Magnification (M₂)
Acts as simple magnifier
Total Magnification
M₁ × M₂
Intermediate Image (v₁)
Distance past objective
Final Image (v₂)
Negative = virtual (correct)
Near Point Formula (D=250mm)
L·D / (fₒ · f_e)
LEGEND
Ray through centre
Ray parallel → focal
Ray through focus → parallel
Virtual ray extension