Also ‘laterally inverted’ is a good description in many circumstances. All three terms are probably easier to recognise than to describe.DaveC426913 said:
The term "upright" in geometric optics refers to the orientation of an object or image in relation to the optical axis. An object or image is considered upright if it is oriented in the same direction as the optical axis, which is a straight line that passes through the center of the lens or mirror.
The direction of light rays determines the orientation of an object or image in geometric optics. Light rays that travel parallel to the optical axis will produce an upright image, while light rays that converge or diverge from the optical axis will produce an inverted image.
Yes, it is possible for both an object and its image to be upright in geometric optics. This occurs when the object is placed at a distance greater than the focal length of a converging lens or mirror, or at a distance less than the focal length of a diverging lens or mirror.
The position of an object or image in relation to the optical axis determines its orientation in geometric optics. Objects placed on the same side of the lens or mirror as the observer will produce upright images, while objects on the opposite side will produce inverted images.
The concept of "upright" is important in geometric optics as it helps us understand the orientation of objects and images formed by lenses and mirrors. It also allows us to make accurate predictions about the behavior of light rays and the formation of images in optical systems.