The visual cortex is part of the occipital lobe that processes information received from the eyes. Color Vision Dimensions of Color Hue is the dimension that captures the essential color of a light in terms of the wavelength entering the eye. Saturation is the psychological dimension that captures the purity and vividness of color sensations. Brightness is the dimension of color experiences that captures the intensity of light. Afterimages or aftereffects of visual stimulation may be either positive or negative.
Negative afterimages are the opposite or the reverse of the original experience.
Positive afterimages are caused by a continuation of the receptor and neural processing following stimulation. Color blindness is the partial or total inability to distinguish colors. Check your Recall Hearing The Physics of Sound Amplitude measures the physical strength of the sound wave and relates to loudness. Frequency measures the number of cycles the wave completes in a given amount of time. The loudness, or physical intensity, of sound is determined by its amplitude.