Daily photo: 18/07/2011
![A row of books on a bookshelf A row of books on a bookshelf](http://www.astrofiammante.net/wp-content/uploads/2011/07/180711.jpg)
Rainbow (n): An optical effect caused by the refraction of light through water droplets, causing it to break into a full spectrum of colours; a collection of vivid colours.
Rainbow (n): An optical effect caused by the refraction of light through water droplets, causing it to break into a full spectrum of colours; a collection of vivid colours.