Fechner's Law is a fundamental concept in the field of psychophysics and refers to the relationship between the physical intensity of a stimulus and the perception of that stimulus by an observer. This law is also known as Weber-Fechner Law, Fechner-Weber Law or Weber's Law, as it was developed by German scientist Gustav Fechner in the mid-19th century and built upon the work of Ernst Weber. Additionally, the concept is sometimes referred to as the law of just noticeable difference, due to its focus on the smallest change in stimulus intensity that can be detected by a human observer. Ultimately, Fechner's Law is an essential aspect of our understanding of perception and how we experience the world around us.
