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 A rainbow is a multicolored arc made by light striking water droplets.  The most familiar type rainbow is produced when sunlight strikes raindrops in front of a viewer at a precise angle (42 degrees). Rainbows can also be viewed around fog, sea spray, or waterfalls.

The word rainbow comes from the Old English word 'renboga', which is derived from the words 'regn' meaning 'rain' and 'boga' meaning 'anything bent or arched'.

 The colours of the rainbow are: Red, orange, yellow, green, blue, indigo, violet. Can you find items from around the house in each of the seven colours?

 A rainbow is a natural spectrum of sunlight in the form of bows appearing in the sky when the sun shines on rain drops. It is combined result of reflection, refraction and dispersion of sunlight from water droplets, in atmosphere. Always it formed in the direction opposite to the sun. Thus, we see a rainbow.

 A rainbow is caused by sunlight and atmospheric conditions. Light enters a water droplet, slowing down and bending as it goes from air to denser water. The light reflects off the inside of the droplet, separating into its component wavelengths--or colors. When light exits the droplet, it makes a rainbow.

 The rainbow is curved as it reflects the round shape of the sun.  Rainbows are circular because raindrops are spherical. When light from the Sun enters a raindrop it is largely reflected back inside a cone with a half-angle of 42 degrees.

 Rainbows caused by rain showers are usually brief. This one lasted about 90 seconds. Rainbows associated with waterfalls can last many hours.

 We see a rainbow in the sky only after rainfall due to dispersion of sunlight by tiny water droplets, present in the atmosphere due to rainfall. The water droplets act like small prisms.

 Rainbows give hope during times of darkness. When the rainbow breaks through the clouds, it shows the power of hope. The colors vibrate in your heart, and life feels new again

 A rainbow is formed when light from the sun meets raindrops in the air and the raindrops separate out all these different colours. Because rainbows are made in the sky they don't touch the ground.

 The sun is always in the opposite part of the sky from the center of the rainbow. This is because a rainbow is actually just sunlight which has been refracted and reflected. Refraction occurs when the sunlight enters and leaves the small spherical water droplets that constitute the mist.

 There are 12 types of rainbows, distinguished by various characteristics, the study suggests. Fat droplets of water or tiny sprays of mist will affect them, along with the angle of the sun

 

• Why do rainbows fade?

 Rainbows are caused by direct sunlight refracting through spherical droplets of water in the air perceived from an ideal angle. When the angle of the sun changes, the droplets evaporate, or clouds intervene in the path of the sunlight, the rainbow disappears.

 In some cultures, including the Navajo tradition, pointing at a rainbow would incur the wrath of the gods. People consider rainbows to be celestial beings, or at the very least, sent by them. So you can ooh and aah at a rainbow all you like, but if you point at one, you're disrespecting the deity responsible for it

•   2 rainbows?

 Known as a double rainbow, this phenomena is actually much more common than you may think. In fact, every rainbow has a secondary rainbow as well- you just don't always see it.  But in order to see the double rainbow, you need a secondary reflection inside the raindrop.

•  What is special about rainbows?

 That's because a rainbow has not physical presence; a rainbow is a purely optical phenomenon, and its appearance – its precise shape, arc, and the width of its color bands – will be slightly different according to the eye of the beholder. 

 

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