Question

sign conventions for spherical lenses it is urgent please help me i willmark u as brainlist

Answer 1

Sign Convention for Spherical Lenses

All the distances are measured from the optical center of the lens.The distances measured in the same direction as that of incident light are taken as positive.The distances measured against the direction of incident light are taken as negative.The distances measured upward and perpendicular to the principle axis are taken as positive.The distances measured downwards and perpendicular to principle axis is taken as negative.