Question

how will you decide wheather a given piece of glass is concave lens, convex lens or a plane mirror​

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

Answer 2

Answer:

hold the given piece of glass over some printed number

• if the letter appear magnified the given piece is a convex lens
• if the letter app diminished the given piece is a concave lens
• if the letters appears to be e of the same size then it is a plain glass mirror