Question

Pls tell the sign convention for lenses.

Answer 1

Step-by-step explanation:

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.

Answer 2

hey mate here is your answer..

The sign convention for lenses is..

1 . the object is always placed on the left of the lens. all distance parallel to the principal Axis are measured from the optical centre

2. the distanced measured to the right of O are taken to be positive while those measured to the left are taken to be negative.

3. distance is perpendicular to the principal axis and above it are taken to be positive.

4.distance is perpendicular to the principal axis and below it are taken to be negative .

5. the focal length of a convex lens is positive while that of a concave lens is negative .

Hope it will be helpful for you.