Rosie Dawson for Radio 4's Sunday programme takes a look at rainbows ... “The rainbow is also spoken of in the Vedic text as Indradhunesh, literally Indra’s bow,” says Dr Kang, “Indra ...

You may not know that a rainbow is presented in a full circle. The "bow" is the portion that people usually see. The viewer must first be between the sun and the falling rain to catch a rainbow.