What is difference between concave and …

Convex Lens

Concave Lens

On passing the light through the lens, it bends the light rays towards each other (i.e., it converges the rays). So due to this, it is called a converging lens.

On passing the light through the lens, it bends the light rays away from each other (i.e., it diverges the rays). So due to this, it is called a diverging lens.

A convex lens is thicker at the centre and thinner at the edges.

A concave lens is thicker at the edges and thinner at the centre.

Due to the converging rays, it is called a converging lens.

Due to the diverging rays, it is called a diverging lens.

Use for correction of long-sightedness.

Use for correction of short-sightedness.

It is also called a positive lens due to positive focal length nature.

It is also called a negative lens due to negative focal length nature.

e.g. Human Eye, Camera, etc.

e.g. Lights, Flashlights,etc.