Question

You are given a circular plane glass sheet, a convex lens and a concave lens. How will you
differentiate them?​

Answer 1

Answer:

Hold the given piece of glass over some printed number: (i) If the letter appear magnified, the given piece is a convex lens. (ii) If the letters appear diminished, the given piece is a concave lens. (iii) If the letters appear to be of the same size, then it is a plane glass mirror.