Light, Shadow, Color
During the 8 lessons of the Light, Shadow, Color Unit, students develop an understanding of light and its role in how we see colors and shadows. In the first few lessons students reflect on the existence of luminous and illuminated bodies. Next, students study shadows by determining how they form. They then move on to the properties of light, seeing that it travels in a straight line and reflects from mirrors and other bright surfaces. In an experiment, students demonstrate how light can bounce or reflect off a surface. Then, during further exploration of mirrors and reflections, students consider natural places where they could see their own images. Students also explore what happens to light as it travels through materials. Light refracts or changes direction as it passes from water into air, causing it to divert from its straight path. They witness this phenomenon when a coin becomes visible under water because of this bent light. Finally, students investigate white light when it is separated into its component colors. They observe that white light separates into different colors to form rainbows in various ways.