Colored Shadows

From: Stephanie Womack (
Date: Thu Mar 10 2005 - 09:27:07 PST

Everyday at a certain time in my room, a thin stream of light comes
through my curtains and instead of just light, a colored shadow is
visible. The shadow itself is more a reflection of what's going on
outside. I can see the buildings, grass, sky, and people walking. It's
also upside down. The colors I can see are blue, white, black, green,
and whatever the people walking by are wearing.

Why does this happen? Is it a simple reflection despite its shadow
appearance, or is it just the sun creating sort of a prism through my
window to make this reflective shadow?

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