The image distance is determined using the thin lens equation, which is 1/f = 1/do + 1/di, where f is the focal length of the lens, do is the object distance, and di is the image distance.
The image distance is directly proportional to the object distance. This means that as the object distance increases, the image distance also increases.
The image height can be calculated using the magnification equation, which is M = -di/do, where M is the magnification, di is the image distance, and do is the object distance.
A real image is formed when the light rays actually converge at a point, whereas a virtual image is formed when the light rays only appear to converge at a point. Real images can be projected onto a screen, while virtual images cannot.
The object distance does not directly affect the image height. However, as the object distance increases, the image height will also increase due to the magnification equation. The actual size of the object does affect the image height.