Question

write a short note on sign convention for spherical lenses ​

Answer 1

Answer:

The sign convention of spherical lenses are: All distance are measured from the optical centre of the lens. The distance measured in the same direction as that of incident light are taken as positive and the distance measured against the direction of incident light are taken as negative.

Answer 2

Answer:

All distances are measured from the optical centre of lens. Distance measured in same direction as that of incident light is taking as positive and distance of measured against the Direction is negative