Final answer:
Weber's Law is the principle that articulates the logarithmic relationship between stimulus magnitude and perceived intensity, stating that the just-noticeable difference is proportional to the original stimulus's intensity.
Step-by-step explanation:
The law that describes the logarithmic relationship between stimulus magnitude and perceived stimulus intensity is known as Weber's Law. This principle states that a just-noticeable difference in a stimulus is proportional to the magnitude of the original stimulus. It's an essential concept in psychophysics, helping to explain how we perceive differences in sensory inputs.
While Weber's Law discusses the relationship between the physical intensity of a stimulus and its perceived magnitude, it is important to note that other principles can also be involved with sensory perception. For example, the inverse square law describes how light or sound intensity decreases with distance, and Stefan's law expresses how the power of blackbody radiation varies with temperature. However, specifically for the logarithmic relationship in question, Weber's Law is the correct answer.