Question

As the radius of curvature for a lens increases, its curvature ___________ and, the focal length ___________. ​

• A. increases, decreases
• B. decreases, increases​
• C. increases​, increases​
• D. decreases, decreases

Answer 1

Answer: (B)

decreases, increases​



As the radius of curvature for a lens increases $(R_2>R_1)$, the curvature of the lens decreases and the focal length of the lens increases $(f_2>f_1)$