Part one of term paper
Imagine that we stand on any ordinary seaside pier, and watch the waves rolling in and striking against the colums of the pier. Large blue waves pay little attension to those columns - they divide right and left and unite after passing each column, much as a army of soldiers would if a tree stood in their path: it is almost as though the colu ...

Part two of term paper
... ripples. We have been watching a sort of working model of the way in which sunlight struggles through the earth's atmosphere. Between us on earth and outer space the atmosphere interposes innumerable obstacles in the form of molecules of air, tiny droplets of water, and small particles of dust. These are represented by the columns of the pier. The waves of the sea represent the sunlight. We know that the sunlight is a blend of lights of many colors - as we can prove for ourselves by passing it ...