Question

How will you differentiate between a convex lens and concave lens by looking at (i) a distant object (ii) a printed page
​

Answer 1

Answer:

In case of a convex lens a far away object looks to be larger and closer than it actually is.

In case of printed paper if we look at it at a position which is closer to the paper then for convex lens we see enlarged letters but for concave lens we get diminished letters.