Question

How can you differentiate a convex and concave lens without touching them?

Answer 1

Answer:

If the curved surface is bulging outwards then it's convex lens and if the curved surface is curved inwards then it's concave lens.

Explanation:

Answer 2

Answer:

Hey mate here is your answer.

Explanation:

If the curved surface is bulged outward then it is convex lens and if the curved surface is bulged inward then it is concave lens .

Hope it helps you.