An object located behind the focal point of a convex lens forms a(an)
a. enlarged real image.
b. enlarged virtual image.
c. reduced real image.
d. reduced virtual image.

The correct answer is Option A.

Explanation:

There are two types of spherical lens:

1. Concave lens: These are formed when two spherical surfaces, curved inwards combine. These are known as diverging lens because it diverge the rays that fall on it. The image formed by these lenses are always virtual, erect and small in size.

2. Convex Lens: These are formed when two spherical surfaces, bulging outwards, combine. These are known as converging lens because it converges the light rays to a point when it falls on it. The image formed by these lenses depend on the position of object.

When the object is placed behind the focal point of a convex lens, it forms a real, inverted and magnified image.

Hence, the correct answer is option A.

if the person is shown to have +90n, then ans is -10n.

if the person is shown to have -90n, then ans is +10n.