Question

difference between concave lens and convex lens 7 points each

Answer 1

Difference between Concave and Convex Lens Image Properties ... Difference between Concave and Convex Lens. A convex lens or converging lens focuses the light rays to a specific point whereas a concave lens or diverging lens diverges the light rays. ... When these lenses are combined they produce sharper images. Most of the eyeglass lenses use combinations of convex and concave lenses.


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Answer 2

Concave lens:

1) It has both surfaces curving inwards.

2) It is thicker at edges and thinner at middle.

3) It diverges the light coming towards it.

4) Its focal length is negative.

5) It always produces a virtual image.

Convex lens:

1) It has both surfaces curving outwards.

2) It is thicker at middle and thinner at the edges.

3) It converges the light coming towards it.

4) Its focal length is positive.

5) It always produces a real image and forms a virtual image only when the object is between the focus and optical centre.