Question

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How are rainbows formed?.....
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Answer 1

Formation of Rainbow:

Rainbow is formed due to Dispersion of white light and production of spectrum.

• After a shower, some tiny raindrops remain suspended in the atmosphere.
• The water droplet refract and disperse the incident sunlight.
• The light undergoes internal reflection from water droplets and finally refract again when it comes out of the raindrop.
• Because of dispersion of light and internal reflection, different colours reach the observer's eye atdifferent angles and as a result, Rainbow is observed.

Extra information:

• We can see a rainbow even on a sunny day if we look at the sky flow water for to a water fountain with the sun behind us.
• A rainbow in always formed in a direction opposite to that of the sun. Therefore, an observer can see a rainbow only when his back is towards the sun.
• In an commonly observed rainbow, the inner arc is of violet colour and the outermost arc is of red colour as shown in the figure.(refer to attachment)

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Answer 2

Answer:

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HOW ARE RAINBOWS FORMED??

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==>> A rainbow is a meteorological phenomenon that is caused by reflection, refraction and dispersion of light in water droplets resulting in a spectrum of light appearing in the sky.

==>> It takes the form of a multicoloured circular arc.

==>> Rainbows caused by sunlight always appear in the section of sky directly opposite the sun

==>> 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.

FOR REFERENCE PICTURE IS ATTACHED ¡!¡!¡