uAmplitude
= Intensity relates to brightness
lMeasures
use only that light that is effective in stimulating the human eye.
lImportant
types of measures of Amplitude
u1. Illuminance - light falling on
a surface
u2. Luminance - light coming off a
surface
u3. Reflectance =
luminance/illuminance
u4. Contrast Ratio = luminance of
brightest area/luminance of darkest area