Thin Lens Equation Calculator
Calculate image distance and magnification.
cm
cm
Result
15 cm
Image distance: 15 cm · Magnification: -0,5
Result in all units
Step-by-step solution
1/f = 1/do + 1/di
What Is a Thin Lens?
The thin lens equation relates a lens's focal length to the object and image distances. It is used in optical design.
How is it calculated?
How Is It Calculated?
1 ÷ f = 1 ÷ do + 1 ÷ di
f: focal length, do: object, di: image distance.
- Enter two values and the third is found.
Frequently Asked Questions
What is the difference between a converging and a diverging lens?
The focal length of a converging lens is taken as positive, while that of a diverging lens is negative.