Lens Equation Calculator
Calculate image distance and magnification using 1/f = 1/dₒ + 1/dᵢ. Enter focal length and object distance.
How to Use the Lens Equation Calculator
- Enter the focal length of the lens in centimeters.
- Enter the object distance from the lens in centimeters.
- Click Calculate to find image distance, magnification, and image type.
Referencia Rápida
| De | A |
|---|---|
| f=10 cm, dₒ=30 cm | dᵢ=15 cm, M=−0.5× |
| f=10 cm, dₒ=20 cm | dᵢ=20 cm, M=−1× |
| f=10 cm, dₒ=5 cm | dᵢ=−10 cm (virtual) |
| Converging lens | f > 0 |
| Diverging lens | f < 0 |
Casos de Uso
- •Camera lens and optics design.
- •Physics problems on thin lenses.
- •Eyeglass prescription calculations.
Fórmula
1/f = 1/dₒ + 1/dᵢ → dᵢ = 1/(1/f − 1/dₒ); Magnification M = −dᵢ/dₒ.
Preguntas Frecuentes
What do positive and negative image distances mean?
Positive dᵢ means a real image (formed on the opposite side of the lens); negative means a virtual image.
What does magnification tell me?
The absolute value gives the size ratio; negative magnification means the image is inverted.
Is this calculator free?
Yes, all OhMyCalc calculators are completely free.