Real, inverted and same size image produced when object is placed at twice the focal length of a convex lens.
Step-by-step explanation:
There are two types of lens or mirrors in spherical shape. One is convex lens and another is concave lens. Convex lens are converging lens and it is used to converge parallel rays coming from infinite distance. While concave lens is a diverging lens.
So, in order to collimate or converge parallel rays convex lenses are used. Also the image obtained depends on the position of the original object placed with respect to the focal length of the lens
In this case, as the object is placed twice the focal length of convex lens, so two rays will be forming leading to production of real, inverted and same size image.