Cartesian Sign Convention For A Concave Mirror

Cartesian Sign Convention for a concave mirror

graph TB A[Cartesian Sign Convention for a Concave Mirror] --> B[Origin] B --> C[The pole of the mirror] A --> D[Direction] D --> E[The direction of incident light at the mirror] A --> F[Signs] F --> G[All distances measured to the right of the origin (along +x-axis) are taken as positive] F --> H[All distances measured to the left of the origin (along -x-axis) are taken as negative] F --> I[The distances measured in the direction of incident light are positive] F --> J[The distances measured against the direction of incident light are negative] F --> K[The height above the principal axis is taken as positive] F --> L[The height below the principal axis is taken as negative]