Question

name the type of lens if its power is -0.2 find its focal lens​

Answer 1

Answer:

A convex lens produces a double size real image when an object is placed at a distance of 18 18 18 cm from it.

Answer 2

Answer:

Answer:power=1/f

therefore,

f=-10/2=-5m

negative sign of focus mean focus must lie same side of the object.

therefore,it is only possible for

concave lens and concave mirror.

hope this will help u