Mountain shadow phenomena.
نویسندگان
چکیده
Regardless of profile, whether flat topped or pointed, to the summit observer all mountain peaks cast triangular shadows when the sun is low. A theory for such anomalous shadows is developed. The shadow apex angle is shown to depend only on the ratio of the breadth of the mountain to its height.
منابع مشابه
Mountain shadow phenomena. 2: The spike seen by an off-summit observer.
The oblique spike or contrast edge seen by an off-summit observer on a mountain shadow when the sun is low is shown to be a perspective effect that depends on the observer's position within the shadow. The degree of visibility of the shadow is due to contrast effects between differently illuminated aerosols. Numerical simulations are used to demonstrate these points.
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ورودعنوان ژورنال:
- Applied optics
دوره 18 3 شماره
صفحات -
تاریخ انتشار 1979