The Lens Equation
- The following is the lens equation that relates the object distance (u), image distance (v) and the focal length.
- When using the lens equation to solve the problem, it’s important to note the positive negative sign of u, v and f.
- The table below gives the conventional symbol and sign for u, v and f.
Positif | Negatif | |
u | Real object | Virtual object |
v | Real image | Virtual image |
f | Convex lens | Concave lens |
Linear Magnification
The linear magnification is a quantity that indicates the ratio of the height of the image to the height of the object.
