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As told in [[Genesis]], a '''rainbow''' is a promise from [[God]] to [[Noah]] (and all mankind) that he will never flood the [[Earth]] again.<ref>Genesis, chapters 5-9</ref> Physics can explain the appearance of rainbows accurately as the result of refraction and multiple reflections of sunlight in droplets of water, but not the feelings of awe and spirituality inspire, as they did in William Wordsworth when he wrote:
As told in [[Genesis]], a '''rainbow''' is a promise from [[God]] to [[Noah]] (and all mankind) that he will never flood the [[Earth]] again.<ref>Genesis, chapters 5-9</ref> Physics can explain the appearance of rainbows accurately as the result of refraction and multiple reflections of sunlight in droplets of water, but not the feelings of awe and spirituality they inspire, as they did in William Wordsworth when he wrote:
My heart leaps up when I behold<br>
My heart leaps up when I behold<br>
I could wish my days to be<br>
I could wish my days to be<br>
Bound each to each by natural piety.<ref>William Wordsworth, [http://www.bartleby.com/145/ww194.html "My Heart Leaps Up When I Behold] (1802)</ref>
Bound each to each by natural piety.<ref>William Wordsworth, [http://www.bartleby.com/145/ww194.html "My Heart Leaps Up When I Behold] (1802)</ref>
Rainbows appear when water droplets are lit by direct sunlight, a condition that rarely occurs during a storm because the clouds block the sun. Rainbows are frequently seen after a storm, when the falling rain has moved into the distance and the sun is roughly behind the observer when the observer is facing the patch of rain.
Rainbows appear when water droplets are lit by direct sunlight, a condition that rarely occurs during a storm because the clouds block the sun. Rainbows are frequently seen after a storm, when the falling rain has moved into the distance and the sun is roughly behind the observer when the observer is facing the patch of rain.