The minimum possible distance between an object and the real image formed by a convex lens is equal to …………

The maximum possible distance between an object and the real image formed by a convex lens is equal to ……

For what position of an obj ect a virtual, erect and diminished image is formed by a concave lens.

A concave lens always forms a ………

The position of the image formed by a concave lens when the object is placed anywhere between optic centre and infinity is

The position of the image formed by a concave lens when the object is placed at infinity is …………

The nature of the image formed by a concave lens when the object is placed in front of it.

The minimum possible distance between an object and the image formed by a concave lens is ………

The maximum possible distance between an object and the image formed by a concave lens is …………

……….. are used in wide angle spyhole in doors.

The size of the image formed by a convex lens is same as that of the object when the object is placed …………

The lens which is thin at the middle on both sides and thicker at the edges is ………

Convex lens is used in the making of microscopes because ………

The lens which can form real and virtual image in air is …………

Every lens has ……… focal points