Final answer:
Weber's law asserts that discernible differences in sensory stimuli are proportional to the magnitude of the original stimulus, and this idea applies to various types of sensory input, such as weight and sound intensity.
Step-by-step explanation:
The main point of Weber's law is that the ratios, not the absolute differences, are important in describing the least perceptible differences in sensory discrimination. According to Weber's law, a just-noticeable difference in any sensory input is proportional to the initial stimulus level. For example, if you are trying to detect the difference between two weights, the difference must be a proportional increase from the original weight, not simply a fixed amount added.
Suppose we apply this law to the question about sound intensities. In that case, we conclude that the ratio of intensities of two sounds of identical frequency, where one is just barely discernible as louder than the other, reflects a constant proportion relative to the initial sound intensity. This is consistent with Weber's law, indicating that the difference threshold is dependent on the initial intensity level. The specific ratio may vary depending on the individual's sensory abilities and the context but adheres to the principle of proportionality that Weber's law describes.