Would you like to see more rainbows? You must be in the right place at the right time.
It’s not just a matter of luck when we look into the sky on a rainy day and spot a glorious arc. The sun has to be shining behind you and rain or mist or spray must be in front of you. That’s when you are in the perfect spot to enjoy one.
Rainbows occur when sunlight and rain combine in a very specific way. When a beam of sunlight travels toward Earth, the light is white. But, if the light beam happens to hit raindrops at a certain angle on the way down, the different colors that make up the beam separate so that we can see them as a rainbow.
The angle for each color of a rainbow is different, because the colors slow down at different speeds when they enter the raindrop. The light exits the raindrop in one color, depending on the angle it came in, so we see only one color coming from each raindrop. Light at different angles coming through many raindrops form the rainbow that we see.
The spectrum of colors is always in the same order with red at the top, followed by orange, yellow, green, blue, indigo and violet. (ROY G BIV is an easy way to remember the order)
April, with its famous showers, is a good time to be on the alert for rainbows. But if Mother Nature doesn’t provide one when you are in the mood, you can create a miniature one for yourself with a garden hose. Meteorologist Joe Rao suggests you simply stand with your back to the sun and adjust the hose to a fine spray. Rainbows can also be seen against the spray of a waterfall.
There are even ways to use water, mirrors and windows to form rainbows in the house. For instructions, visit www.wikihow.com/Make-a-Rainbow
Rainbows are the subject of several children’s picture books including nonfiction books that explain the science behind the beauty and fictional story books.
— Ready-to-Read Level One Rainbow. Newbery Honor recipient and New York Times bestselling author Marion Dane Bauer teaches beginning readers about rainbows in this one. It is illustrated by John Wallace.
— A Rainbow of My Own, by Don Freeman. A small boy imagines what it would be like to have his own rainbow to play with.
Marilyn Ostermiller is a long-time business journalist who now writes for children. You can follow her on Twitter @Marilyn_Suzanne.