Question

difference between concave lens and convex lens​

Answer 1

Answer:

concave lens:-

Concave lens are also called divergent lens as they expand the light (bend outward) falling on it.

Real images are formed using convex lens by placing them in between the object and the screen

Virtual images are also formed by convex lens which is erect and larger in size.

Concave lens do not form real images. They only form virtual images which are always erect and smaller in size.

Applications of lens include magnifying glass, telescopes, contact lens, cameras etc.

convex lens:-

Convex lens are thicker in middle than the edges whereas concave lens are thinner at the middle than at the edges

Lenses are transparent and light can pass through them.

Convex lens are also called convergent as they concentrate (bend inward) the light falling on it

Explanation:

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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.