Psychophysics is a branch of experimental psychology that studies the relationship between the magnitude of sensation (an experience that occurs in a particular sensory way) and the corresponding intensity of the stimulus or stimulus (i.e., physical lighting). In a broader context, psychophysics can be considered the science of measuring the body’s responses to environmental stimuli. It was founded by Gustav Jödor Fichner (“The Elements of Psychophysics”, 1860), who formulated the main psychophysical law (which is found in the Dictionary Concepts)