Question

How can convex and concave lens can be identified without touching them

Answer 1

Explanation:

the given mirror is held near the face and the image is observed.

Plane mirror - If image is upright, of same size and it does not change in size by moving the mirror towards or away from the face.

Concave mirror - If image is upright and of bigger size and increases in size on moving the mirror away

Answer 2

Answer:

Light - Reflection and Refraction.

✯How will you distinguish between a convex and a concave lens without touching them?

Convex and concave lens can be distinguished by touching them. 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:

I hope it will help you :)