Question

Sign Convention of Spherical lens​

Answer 1

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

Answer 2

Answer:

Sign Convention for Spherical Lenses

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.