| 129 | 130 | 131 | 132 | 133 |
| 1 | 306 | 613 | 919 | 1225 |
|
A single and distinct luminous body causes stronger relief in the
object than a diffused light; as may be seen by comparing one side
of a landscape illuminated by the sun, and one overshadowed by
clouds, and so illuminated only by the diffused light of the
atmosphere.
THIRD BOOK ON LIGHT AND SHADE.
Definition of derived shadow (158. 159).
1
58.
Derived shadow cannot exist without primary shadow. This is proved
by the first of this which says: Darkness is the total absence of
light, and shadow is an alleviation of darkness and of light, and it
is more or less dark or light in proportion as the darkness is
modified by the light.
1
59.
Shadow is diminution of light.
Darkness is absence of light.
Shadow is divided into two kinds, of which the first is called
131
Page
Quick Jump
|