Thin Lens Equation Calculator
Solve the thin lens equation 1/f = 1/d₀ + 1/dᵢ. Enter any two values to find the third, plus magnification and image type.
Solve 1/f = 1/d₀ + 1/dᵢ. Select what to solve for, enter the two known values, and get the result instantly.
Positive = converging; negative = diverging
Distance from object to lens
Positive = real image (opposite side)
Formula
1/f = 1/d₀ + 1/dᵢ
Focal Length (f): 20 cm
Object Distance (d₀): 30 cm
Image Distance (dᵢ): 60 cm
Magnification (m): -2
Key formulas: 1/f = 1/d₀ + 1/dᵢ | m = −dᵢ / d₀
Converging lens: f > 0 | Diverging lens: f < 0 | Real image: dᵢ > 0 | Virtual image: dᵢ < 0
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