An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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forward scattering
  پراکنش ِ پیش-سو  
parâkaneš-e piš-su
Fr.: diffusion en avant  

Scattering in which photons emerge from the → scattering medium travelling predominantly in the same direction as they entered. The → halos around the Sun and Moon in wet weather are caused by forward scattering by water droplets in the Earth’s atmosphere.
→ backscattering.

See also: → forward; → scattering.