Converging/diverging mirrors/lenses: conceptual question

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Understanding the sign conventions for image distance (di) and object distance (do) is crucial in optics. Real images and objects are assigned positive values, while virtual images and objects are negative. For converging lenses, the focal length is positive, whereas for diverging lenses, it is negative. This distinction helps in applying the lens formula effectively. Mastering these conventions is essential for solving optics problems accurately.
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Homework Statement



Im having trouble knowing/remembering when my di and do should be positive or negative. Does anyone have any tips/advice for this?[/B]

Homework Equations



1/f = 1/di + 1/do, hi/ho = di/do[/B]

The Attempt at a Solution


No solution. Just a question.[/B]
 
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Real images and objects positive, virtual images and objects negative.
Converging lens focal length positive, diverging negative.
 

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