Equations
Lens magnification
Optics · id magnification_ratio
M = \frac{d_i}{d_o}
| Symbol | Quantity | Unit | Meaning | Usual range |
|---|---|---|---|---|
M | magnification | dimensionless | How many times larger the image is (magnitude) | 0.001 to 1000 |
di | image distance | m | Distance from the lens to the image | 0.0001 to 1e+06 |
do | object distance | m | Distance from the object to the lens | 0.0001 to 1e+06 |
Assumptions
- Thin lens
- Magnitudes only (inversion ignored)
Valid when
- No extra conditions.
Found by
Questions with these words retrieve this equation: magnification, magnified, times larger, lens, image, zoom.
Source
OpenStax University Physics Volume 3, Chapter 2 (reference; entry written by the project). License: MIT. Entry confidence: 0.99.