If the image formed by a convex lens is of the same size as that of the object,what is the position and nature of the image with respect to the lens?

Where should an object be placed in front of a convex lens to obtain a real and inverted image of the same size as the object?

Is it possible for a lens to act as a convergent lens in one medium and a divergent lens in another?

State the sign convention used to measure distances from a mirror.

$A$ ray of light $XY$ is incident on a mirror as shown in the figure. The angle of incidence for this ray is the angle between it and the line joining two other points in the figure. Name these two points and show the course of rays after reflection.

$A$ $2.0 \text{ cm}$ tall object is placed perpendicular to the principal axis of a convex lens of focal length $10 \text{ cm}$. The distance of the object from the lens is $15 \text{ cm}$. Find the position,nature,and size of the image formed.