Concave lens and Convex lens.
|Concave lens||Convex lens|
|1.||It is a diverging lens because it diverges the rays falling on it.||It is a converging lens because it converges the rays falling on it.|
|2.||It is thin at the center and bulged at the edge.||It is thin at the edge and bulged at the centre.|
|3.||The image formed by concave lens is always diminished and virtual.||The image formed by convex lens can be real as well as virtual. Also, the image formed can be diminished as well as magnified.|
|4.||It has a virtual focus.||It has a real focus.|
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