Which equation correctly relates the object distance

PHYSICS · Single correct · CBSE · Physics · Light — Reflection and Refraction · Light — Reflection and Refraction

Problem

s_o

, the image distance

s_i

, and the focal length

f

for any thin lens? (a)

\dfrac{1}{s_i}-\dfrac{1}{s_o}=\dfrac{1}{f}

(b)

\dfrac{1}{s_i}+\dfrac{1}{s_o}=\dfrac{1}{f}

(c)

\dfrac{1}{s_i}+\dfrac{1}{s_o}=\dfrac{1}{2f}

(d)

\dfrac{1}{s_i}+\dfrac{1}{s_o}=\dfrac{2}{f}