Question

write 3 sign convention used for refraction through lenses ​

Answer 1

Answer:

1. All the distances are measured from the optical centre of the lens.  

2. All the distances which are measured in the same direction of the incident light ray will be taken as positive.  

3. All the distance which are measured against the direction of incident light are taken as negative.

Explanation:

Answer 2

The sign conventions followed in case of refraction of light through spherical lenses is that distances to the left side of the lens are negative and distances to the right side of the lens are positive. Focal length of the lens is 16cm and it is convex in nature.