When the results are satisfactory, he decided to become an astronomer at the stars in the sky. Then the idea of light and color. He discovered the fact that the sun is seen with the naked eye, it is a combination of seven colors are red, orange, yellow, green, blue, indigo and violet to the color of sunlight of Isaac Newton. The light is passed through a peephole into a dark room. The glass rod It will come out clearly. Like the rainbow after the rain, a phenomenon of nature. (Rainbow from sunlight through water droplets in the air)