Question

Sign conventions for all lenses

Answer 1

Answer:

for all less, the distance is measured from optical center. If a point is on left side of lende then distance is negative and if it is on right side of the lende then it's distance is negative from the lense

Answer 2

HEYA MATE HERE U GO

. all distance are measured from the pole.

. distance measured along the direction of the light rays are taken as positive

distance measured opposite to the direction of the incident light rays are taken as negative

. the heights measured vertically above from the points on axis are taken as positive.

. the heights measured vertically down from the points on axis are taken as negative.

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