A symmetric doule convex lens is cut in two equal parts by a plane perpendiculr to the pricipal axis. If the power of the original lens was 4D, the power of a cut lens will be

If a equiconvex lens of focal length f is cut into two halves by a plane perpendicular to the principal axis, then

There is symmetric bi-convex lens and it is cut in two pieces by a plane containing principal axis. If power of the original lens is 10 D then what will be the power of each part ?

There is a symmetric bi-convex lens and it is cut in two equal parts by a plane passing through the centre of lens and perpendicular to its principal axis. If power of original lens is 10 D then what will be the power of each part of the lens ?

A thin double convex lens is cut into two equal pieces A and B by a plane containing principal axis.The piece ' B' is further cut into two more pieces 'C' and 'D' by another plane perpendicular to the principal axis.If the focal power of the original lens is 'P' then those of A and C are

A thini, symmetric double convex lens of power P is cut into three parts A, B, and C as shown in Figure. The power of

If the power of a lens is - 4.0 D, then it means that the lens is a

The two surfaces of a biconvex lens has same radii of curvatures . This lens is made of glass of refractive index 1.5 and has a focal length of 10 cm in air. The lens is cut into two equal halves along a plane perpendicular to its principal axis to yield two plane - convex lenses. The two pieces are glued such that the convex surfaces touch each other. If this combination lens is immersed in water (refractive index = 4/3 ), its focal length (in cm ) is

If a lens is cut into two pieces perpendicular to the principal axis and only one part is used, the intensity of the iamage will be