To learn about the nature of light and color. To learn about atomic structure. To learn about spectroscopy and how it is used. This is a sign that you are absorbing some of the sun's energy.
Light is a form of energy known as electromagnetic radiation.
It is the primary mode of energy transfer through space and the source of energy for all life on earth. Yet, in spite of these great distances, we can tell what elements are found in stars by analyzing the light they give off. The relationship between color and wavelength. Newton thought that light consisted of rapidly moving tiny particles and that the colors resulted from different speeds of travel. In the mid 18th century, the Dutch physicist, Huygens, showed that Newton's experimental results can be explained by assuming that light is a wave.