hi as you wish i am writing an article about "how will be the rainbow formed",
When the rain rains and stopped we will see a wonderful art in the sky with bow shaped and multiple colors. We named it as RAINBOW. It fills smiles in children, wow expression in adults, but we don't know the science behind it, The light rays from the sun has 7 wonderful colors but we can't see them with our naked eye. For the first time Sir Issac Newton told and demonstrated that the light rays have 7 colors. when the rain stopped the atmosphere is filled with water molecules in the rained place. At that moment the light rays which are emitted by sun travels through these water molecules. When these light ray entered into a water molecule the light ray which is traveled into the molecule is split-ted into 7 different colors. Every light ray traveled into water molecule is split-ted into 7 different colors in open place and formed as rainbow. when the water molecules are evaporated the rainbow will disappears.
The colors in rainbow are known as VIBGYOR. V - violet, I - Indigo, B - Blue, G - Green, Y - Yellow, O - Orange, R - red,