Weber’s+law

=Weber’s Law=

toc Read here about a physical phenomenon that is exponential in nature.

=Overview=

Ernst Weber discovered what we now know as Weber’s Law, that the discriminability of two magnitudes (two sound or light intensities) is a function of their ratio: over a large dynamic range, and for many parameters, the threshold of discrimination between two stimuli increases linearly with stimulus intensity. By careful psychophysical experiments, often requiring thousands of discrimination trials on pairs of stimuli, they identified basic regularities of our psychological apparatus.

See also Fechner's law.