Abstract
Compared with Mie scattering theory, Airy rainbow theory clearly miscalculates
some monochromatic details of scattering by small water drops. Yet when
monodisperse Airy theory is measured by perceptual (rather than purely physical)
standards such as chromaticity and luminance contrast, it differs very little
from Mie theory. Considering only the angular positions of luminance extrema,
Airy theory’s errors are largest for small droplets such as those that
dominate cloudbows and fogbows. However, integrating over a realistic drop-size
distribution for these bows eliminates most perceptible color and luminance
differences between the two theories.
© 1998 Optical Society of America
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