Space to play or pause, M to mute, left and right arrows to seek, up and down arrows for volume. What does the size of an object's shadow tell us about the relative location — to the light ...

Adding a semiotic perspective can help to recognize how light and shadow contributes to the meaning of the built environment.

His artistic and scientific interests were conjoined. In painting, Leonardo could apply all he learned about geometry, shadow and light, about the interplay of the eye and mind in perception.