Psychophysical laws describe the relationship between physical stimuli and the sensations they produce in humans. These laws help explain how we perceive changes in our environment, such as light, sound, and touch. One well-known example is Weber's Law, which states that the smallest detectable difference in a stimulus is proportional to the original intensity of that stimulus. Another important principle is Fechner's Law, which builds on Weber's findings. It suggests that our perception of a stimulus grows logarithmically as the intensity of the stimulus increases. Together, these laws provide a framework for understanding how we experience and interpret sensory information.