Explain the New Cartesian sign convention, while dealing with the reflection of light by spherical mirrors
Answer (1)
17th Oct, 2026
Hello student,
You can check the image below.
New Cartesian Sign Convention
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Pole (P) is the origin.
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Distances in the direction of incident light are positive (+); opposite direction is negative (−).
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Height above the principal axis is positive (+).
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Height below the principal axis is negative (−).
Remember: Object distance is always negative for spherical mirrors.
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