Re: The Color of Shadow

From: Philip Hammar <jackal_at_pha.jhu.edu>
Date: Tue, 02 Jan 1996 10:06:24 -0500 (EST)

Barbara Braun <zbraun_at_minyos.its.rmit.EDU.AU> writes:
- ->

• -> In reply to John's question about the red moon casting green shadows:
• ->
• -> [The effects of color saturation on human vision cause the color in
• -> shadows]

        While this seems to be getting farther from things Gloranthan, I thought it might provide some insight into the color of shadows in Glorantha to explain where it comes from in Earth. Shadows from sunlight have a blueish tinge because they are illuminated from the diffuse (and isotropic) blue light from the sky. Ingeneral, shadows take on the color of whatever the ambient diffuse background light is. If one were to be in a red room with a white light, the shadows would have a red tinge. On Earth, the moon hardly provides enough light to stimulate color vision at all, let alone saturate the color perceptors.

                        Phil

Standard Disclaimer: Earth != Glorantha

Philip Hammar, Graduate Student Internet: jackal_at_pha.jhu.edu Dept of Phys & Astro at Johns Hopkins Phone: (410)516-7866 You've entered another dimension; a dimension of heat and flame. You've entered USENET.

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