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Help me out with sign conventions in lensmakers formula

Help me out with sign conventions in lensmakers formula

Grade:12

2 Answers

Umakant biswal
5359 Points
4 years ago
dear sahithi 
for a convex lens 
r1 = positive 
r2 = negative 
f = positive 
where r1 , r2 are radius of curvature 
and for diverging lens 
R1 = negative 
R2 = positive 
f= negative 
HOPE IT CLEARS 
REGARDS 
Kunal Dhawale
27 Points
4 years ago
Thanks for waiting for the best answer. The direction from which the light comes is taken positive and the other is taken negative. It is same as Cartesian plain

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