Question

Radii of curvature of a converging lens are in the ratio 1:2. Its focal length

Answer 1

Answer:

fi/f2=1/2

Explanation:

R1/R2=1/2

R1=x cm,f1=R1/2=x/2 cm

R2=2x cm,f2=R2/2=2x/2

so f1/f2=1/2