When the sunlight strikes raindrops in the air, they act like a prism and form a rainbow. The rainbow is a division of white light into many beautiful colors. These take the shape of a long round arch, with its path high above and its two ends apparently beyond the horizon. There is , according to legend, a boiling pot of gold at one end.
People look, but no one ever finds it.
When a man looks for something beyond his reach, his friends say that he is looking for the pot of gold at the end of the rainbow.