Question

can you answer the question using the concept of refraction through lens​

Answer 1

Answer:

there are 2 types of lens

concave= a mirror that curves inwards that is thinner at the centre than at edges

convex =a mirror that curves outwards that is thicker at the centre than at edges

Answer 2

$\huge\fbox\red{A}\LARGE\fbox\pink{N}\fbox\green{S}\LARGE\fbox\blue{W}\fbox\orange{E}\huge\fbox\red{R}$

The focal length of a lens depends on the material by which it has been made and radii of curvatures of lens. We need to change focal length of lens to get same image distance for various positions of object.