An equiconvex lens of focal length `15 cm` is cut into two equal halves in thickness. What is the focal length of each half ?

A equiconvex lens of focal length 30 cm is divided into two equal halves in thickness.find the focal lnegth of eah half.

A diverging lens of focal length F is cut into two equal parts each forming a planoconcave lens. What is the focal length of each part?

Focal length of a convex lens in air is 25 cm. It is cut into two equal halves along its principal axis. What will be the focal length of each half ?

A equiconcave lens of focal length 15 cm is cut into two equal havles along dotted lines as shown in figure. What will be new focal length of each half.

An equiconvex lens of focal length20 cm is cut into two equal halves perpendicular to the principal axis and kept at a separation of 10 cm co-axially. What ils the focal length of the each part is?