NATIONAL FIND A RAINBOW DAY
Each year on April 3rd, National Find a Rainbow Day challenges us to look to the sky and find a colorful ray of hope cast across it.
There are people that see rainbows as an artistic masterpiece in the sky, to others it is a sign of hope and to many a sign of promise.
It can be all three; beauty, hope and promise. (Jill Magnus)
A spectrum of light in the form of a multicolored arc, appearing in the sky, is caused by both reflection and refraction of light in water droplets in the Earth’s atmosphere. These rainbows always appear directly opposite of the sun. The light is refracted (bent) when it enters a droplet of water, then is reflected inside on the back of the droplet and refracted again when leaving it.
Red is the color that is visible on the outer part of a rainbow and violet on the inside of a primary rainbow. Children learn in science class the mnemonic ROYGBIV to help them to remember the sequence of colors in a rainbow: red, orange, yellow, green, blue, indigo, violet. Many forms of airborne water can cause rainbows including, rain, mist, spray, and dew.
HOW TO OBSERVE #FindARainbowDay
- Find yourself a rainbow or use the garden hose or a prism to make one yourself.
- Families, students, and classrooms, create a rainbow from the colorful hearts on this printable. There’s at least one for every color in the rainbow. Take out your color crayons and finish what we’ve started.
- Then cut them out and put them in a cheerful, sunny window to brighten the day of someone passing by.
- Create a rainbow as part of a science project.
- Use #NationalFindARainbowDay to post on social media.
NATIONAL FIND A RAINBOW DAY HISTORY
National Day Calendar continues to research the origins of this bright and colorful holiday.
Q. When is the best time to look for a rainbow?
A. Rainbows often appear after it rains and the clouds have cleared. The sun casts its rays through the remaining moisture in the air. The water in the air bends the light into its colors. You can also find a rainbow near the ground where dew had formed or water from a sprinkler. Use a prism to cast a rainbow on a wall.
Q. How can I see an entire rainbow?
A. You need to get up into the sky to see the full circle of a rainbow. If you’re on an airplane when it’s raining, you might get to see the entire circle.
Q. Does saltwater refract light differently than freshwater?
A. Yes. Saltwater is denser than freshwater so it will form rainbows with a smaller radius.