According to Weber's law, how are difference thresholds characterized?

Weber's law states that the just noticeable difference (JND) between two stimuli is a constant proportion of the original stimulus, rather than a constant amount. This principle suggests that as the intensity of the original stimulus increases, the amount needed for a person to perceive a difference also increases, but proportionally, not absolutely. For example, if you are lifting a light weight, it may take a small additional weight for you to notice the difference. However, if you are lifting a heavier weight, it may require a larger additional weight to notice a change, but this increase is consistent in relation to the initial weight. This proportional relationship is a key feature of how sensory differences are perceived, adhering to the concept of sensitivity changing with the level of the initial stimuli rather than a fixed numerical threshold.