Question

is there any relationship between radius of curvature and focal length of a concave mirror​

Answer 1

Hola!!⤵️⤵️

⭕focal length = 1/2 ( centre of curvature)

Answer 2

normally the relation between focal length and radius of curvature is is

f=R/2

but if you consider the angle of incidence too (in big mirrors)

then the relation become f=(R/2)*sec i where I is angle of incidence