Question

Distance between the principal focus and center of curvature of lens is ___ a)principal axis b)focal length c)principal focus d)center of curvature​

Answer 1

the answer is option b focal length

Answer 2

Answer:

b) focal length

Explanation:

actually, distance between pole to principal focus was called focal length(f)

and distance between pole to center of curvature as radius of lens(R)

but we know that, R = 2f

so, accurate answer may be option b - focal length