Along a horizontal line, from left, a point, a large giraffe labeled Object, a small giraffe labeled Image, a double concave lens centered on the line, another point on the line. A dotted orange line passes up and right through the first point, goes to the head of the large giraffe, turns solid, and passes through the lens to the label 2. A shorter orange line passes straight from the top of the large giraffe to the center of the lens. A Dotted green line runs straight from the left through the neck of the larger giraffe through the lens to a label 3 on the right side. A shorter green line runs from the top of the larger giraffe to the center of the top half of the lens and then as a dotted line to the second point. A solid blue line runs from the top of the large giraffe through the center of the lens to a label 1 right of and below the lens. In the diagram, the shape of the lens is and the image is .