1631Every Day ScienceMedium
The distance between the optical centre of a convex lens and its principal focus is called its_______?
AFocal Length
BRadius of Curvature
CMagnification
DPower
Correct answer
A. Focal Length
Explanation
The distance between the optical centre and principal focus of a lens is called focal length. Focal length of a lens depends on the refractive index of the glass and its curvature.