Summary for the different position of object of the concave lens

Characteristics of the image formed:•Virtual•Diminished•Upright •In front of the lens

MagnificationM = D/dM= v/u

Where D = size of imaged =size of object

v=distance imageu= distance object

Relationship• Size of the image formed by the lens varied

with the object distance, u. • As the u increases, the size of the image

decreased.• The magnification value decreases if the

object moves further and further away.• The object diminished as the object distance

increases.

Application in lens in optical devices

•Microscope• Telescope• Spectacle• Binocular