Beakman explains what a rainbow is, and he goes up into the "clouds" to look at rainbows up-close. He demonstrates how a prism works and then he goes on to compare raindrops to a bunch of prisms in the clouds. Beakman makes a DIY prism with a mirror and water. He dresses like a hippie and says he is ROY G BIV to help remember the colors of the rainbow.
Beakman explains that light is made up various colors using ROY G BIV and a prism. He then explains that, like a radio with different stations at different frequencies, light has various wavelengths for each color. Then Beakman uses an animation clip to explain light scattering to show why the sky is blue during the day and pink and orange at dawn and dusk.