![](http://uploads.cdn.yaclass.in/upload/pumpa/img_4.png)
PUMPA - SMART LEARNING
எங்கள் ஆசிரியர்களுடன் 1-ஆன்-1 ஆலோசனை நேரத்தைப் பெறுங்கள். டாப்பர் ஆவதற்கு நாங்கள் பயிற்சி அளிப்போம்
Book Free DemoWe will use a set of sign conventions called the New Cartesian Sign Convention when dealing with a light reflection by spherical mirrors. The mirror's pole (\(P\)) is used as the origin in this convention. The x-axis (\(X'X\)) of the coordinate system is taken as the principal axis of the mirror.
The following are the rules to be followed while using sign convention:
- Always place the object to the left of the mirror. This indicates that the object's light strikes the mirror from the left side.
- The mirror's pole is used to measure all distances parallel to the principal axis.
- All distances to the right of the origin (along \(+ x-axis\)) are positive, while those to the left (along \(– x-axis\)) are negative.
- Positive distances are measured perpendicular to and above the principal axis (along \(+ y-axis\)).
- Negative values are assigned to distances measured perpendicular to and below the principal axis (along the \(–y-axis\)).
![22.png](https://resources.cdn.yaclass.in/e5a9b3b8-fb40-4506-bec9-6509dcd22aa8/22w300.png)
Sign convention for spherical mirrors
The below table shows the sign convention,
![21.png](https://resources.cdn.yaclass.in/e371f0cc-188d-4ada-be56-8e33f9a04117/21w658.png)