Physics > Reflection of Light > 3.0 Basic terminologies of spherical mirrors
Reflection of Light
1.0 Introduction
2.0 Reflection of light
3.0 Basic terminologies of spherical mirrors
3.1 Paraxial approximation
3.2 Spherical mirrors
3.3 Sign convention
3.4 Ray tracing
3.5 Image formation by concave mirror
3.6 Image formation by convex mirror
4.0 Spherical mirror formulae
5.0 Magnification
6.0 Motion of object and image
3.3 Sign convention
3.2 Spherical mirrors
3.3 Sign convention
3.4 Ray tracing
3.5 Image formation by concave mirror
3.6 Image formation by convex mirror
1. All distances are measured from the pole $P$.
2. Distances measured along the direction of incident rays are taken as positive.
3. Distances measured along the direction opposite to the incident rays are taken as negative.
4. Distances above the principal axis are positive.
5. Distances below the principal axis are negative.