Why can’t we reach the end of a rain­bow?

BBC Earth (Asia) - - Q & A -

A rain­bow isn’t a fixed ob­ject that hangs in the sky. It’s an il­lu­sion formed be­tween the sun­shine, the rain and your eyes. Light bounces out of the rain­drops at an an­gle of 40° for red light, and 42° for blue. And that’s true wher­ever you stand, so as you move, the rain­bow moves too and you can never catch it. LV

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