Lenses are used in cameras, telescopes, binoculars, microscopes and corrective glasses. A lens can be converging (convex) or diverging (concave).

To clarify all your doubts about the concave lens and convex lens, students can read this article. Here, the difference between a concave lens and a convex lens has been discussed in detail.

Convex and concave lenses can both be used to correct defects of vision. The most commonly occurring defects of vision are ‘short sightedness’ and ‘long sightedness’. People who are ...

If focal length = f = ‒ 50 cm, then P = 100/ f = 100/ −50 = −2D, lens is concave. Question. 38 A student focused the image of a candle flume on a white screen using a convex lens.