First, know what rainbow is called? After the clouds, the sky becomes shocking. Then the sun rises again in the sky. Occasionally, there is a variety of colors in the sky after the rain. It seems, the bows of various colors are in the sky. The rainbow is called the arrow in different colors. To say more clearly, the rainbow or the rainbow or the induction is a visible arcade line which is caused by reflection and refraction of sunlight in the atmosphere in the atmosphere. Normally after rain, the rainbow on the opposite side of the sun can be seen in the sky. Seven colors of rainbow are seen in rainbow. Seeing it is bent like a bow, its name is Raindunu. You can ask questions in your mind, why rainbow in the sky? The answer is ... the sky after the rain