Question

What is a sign convention of lenses

Answer 1

Answer:

Sign convention is a set of rules to set signs for image distance, object distance, focal length, etc for mathematical analysis of image formation. According to it: Object is always placed to the left of lens. All distances are measured from the optical centre of the mirror

Explanation:

Answer 2

Answer:

i think dear......

Explanation:

The convention if convex len is positive.In case of refracation through a lens if,we take the left hand side to be positive and right hand side to be negative, then focal length of the second surface of the lens that is used to determine sign.......

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