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will be seen with all the contours similar to those of the body that
casts it, if the eye is placed just where the centre of the light
was.
The shadow will look darkest where it is farthest from the body that
casts it. The shadow c d, cast by the body in shadow a b which
is equally distant in all parts, is not of equal depth because it is
seen on a back ground of varying brightness. [Footnote: Compare the
three diagrams on Pl. VI, no 1 which, in the original accompany this
section.]
On the outlines of cast shadows (192-195).
1
92.
The edges of a derived shadow will be most distinct where it is cast
nearest to the primary shadow.
1
93.
As the derived shadow gets more distant from the primary shadow, the
more the cast shadow differs from the primary shadow.
1
94.
OF SHADOWS WHICH NEVER COME TO AN END.
55
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