Tag: spectral sensitivity

January 29, 2026 / Mohammed looti

PURKINJE SHIFT

Introduction and Definition of the Purkinje Shift The Purkinje Shift, often recognized as the Purkinje effect, constitutes a fundamental optical and psychological phenomenon that profoundly influences human color perception, especially as ambient light intensity changes. This effect describes the systematic change in the spectral sensitivity of the human eye as the illumination levels transition from […]

November 19, 2025 / Mohammed looti

SPECTRAL SENSITIVITY

Introduction to Spectral Sensitivity Spectral sensitivity, fundamentally defined, refers to the extent that light of different wavelengths is absorbed by the photopigments of the retina. This crucial visual phenomenon dictates how effectively the visual system detects and responds to electromagnetic radiation across the visible spectrum, which typically ranges from approximately 380 nanometers (nm) to 740 […]