A Caltech Library Service

Mountain shadow phenomena

Livingston, William and Lynch, David (1979) Mountain shadow phenomena. Applied Optics, 18 (3). pp. 265-269. ISSN 0003-6935.

See Usage Policy.


Use this Persistent URL to link to this item:


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.

Item Type:Article
Additional Information:© Copyright 1979 Optical Society of America Received 25 May 1978. We acknowledge the stimulus provided by Kathy DeGioia, University of Wyoming, who inquired of us why the shadows are pyramidal. Pierre Turon, Gary Ladd, Frank Recely, and Martin Cohen contributed photographs, and E. Hiei, Tokyo Astronomical Observatory, found the material on Mt. Fuji. Kitt Peak National Observatory is operated by the Association of Universities for Research in Astronomy, Inc., under contract with the National Science Foundation.
Record Number:CaltechAUTHORS:LIVao79
Persistent URL:
Alternative URL:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:5908
Deposited By: Archive Administrator
Deposited On:08 Nov 2006
Last Modified:26 Dec 2012 09:16

Repository Staff Only: item control page