ABSTRACT
A shadow is cast by light that comes from a point source, which gives parallel light rays. Part of the light rays is blocked by the object making a dark area, and part of the rays that reach the screen make that part of the screen bright. X-ray pictures are simply shadows in x-ray light made visible by a fluorescent screen or photographic film. The chapter presents the principles, types, and applications of shadows, and solar and lunar eclipses. A solar eclipse occurs when the Moon passes between the Sun and the Earth, blocking the light from the Sun. A lunar eclipse occurs when the Moon passes through the Earth’s shadow. There are three basic types of lunar eclipses that occur in the universe: penumbral lunar eclipses; partial lunar eclipses; and total lunar eclipses. The chapter describes several experimental studies of light shadow formation using different optical objects.
