Question

3. Name the type of lens whose power is positive.
The image of an
object formed by a lens is
real inverted & the same size. If the image
is at a distance 40cm from the lens what
is the nature & power of the lens.
​

Answer 1

The power of a convex lens is positive. It is given that the image of the object formed by the lens is real, inverted and of the same size as the object. Also, we know that only convex lens can form a real and inverted image. Thus, the given lens is a convex lens.