A rainbow is a multicolored arc created by light water droplets which is caused by sunlight and atmospheric conditions. The rainbow is an optical phenomenon that simply does not appear in the sky at a given moment. Rainbows can also be seen around fog, spray or waterfalls. The rainbow’s color depends on where you stand and where the sun (or other source of light) shines.
How do Rainbows form?
The light enters the water droplet, slows down and bends as it moves from the air to the thicker water. The light will reflect from the inside of the droplet with different wavelengths or colors. When light comes out of the water droplets, a rainbow will form.
Can Create your own rainbow at Home?
You usually don’t see a rainbow until the storm clears and the sun comes out, but you can make a rainbow in your own house.
Steps to Create a Rainbow at Home
Fill a shallow pan with about half the water.
Place the mirror diagonally in the water.
Shine light where the mirror is underwater (or, using the sun, bring the pan and mirror outside so the sun shines on the underwater mirror)
Place the white paper over the mirror and adjust the Angle until you see a rainbow!