Reference: Merriam Webster's Collegiate Dictionary (Eleventh Edition)
"shadow (noun) 1: partial darkness or obscurity within a a part of space from which rays from a source of light are cut off by an interposed opaque body."
Steve , by absence of light I do not mean that there is absolutely no light; you have to have light to make a shadow; however a shadow is an area that no light has penetrated (absence of light). Hence it is black in that specific spot.
I may have not made myself clear. If that is the case I apologize to Claudio, and you.
Case closed.
Bruce
