Concept explainers
To distinguish: converging lens and diverging lens.
Explanation of Solution
Introduction:
A lens is a transparent piece of material made up of glass and it can have both the surfaces curved or one surface curved and the other one plane.
A lens is basically divided into two types based on the nature of bending the light rays towards or away from its centre. A convex lens is also called converging lens as it converges the light rays incident parallel to the principal axis to a single point called focus. Such a lens is thick in the middle and thick at the periphery. These lenses have a positive focal length and are capable of forming both real image and a virtual image of an object.
A concave lens is also called diverging lens as it diverges the light rays incident parallel to the principal axis to a single point called focus. Such a lens is thin in the middle and thick at the periphery. These lenses have a negative focal length and are capable of forming only virtual image of an object.
Conclusion:
Hence, a converging lens converges light rays towards optical centre and forms real and virtual image both while a diverging lens diverges the light rays away from the optical centre and form virtual image.
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