Question

what are use sign conversations of lenses​

Answer 1

We apply sign conventions to understand the positions of object and image . We can a formulae follow sign conventions when we apply same sign conventions while its derivation unless it will not follow sign conventions and will give inappropriate answers.

Answer 2

Answer:

Sign convention - definition

Sign convention - definitionObject is always placed to the left of lens. All distances are measured from the optical centre of the mirror. Distances measured in the direction of the incident ray are positive and the distances measured in the direction opposite to that of the incident rays are negative

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