Rainbows are optical phenomena that occur when sunlight interacts with raindrops, causing the light to disperse and reflect internally, resulting in a multi-colored arc. They are only visible on Earth, and require millions of raindrops to be seen clearly. In rare cases, higher-order rainbows with fainter colors can form from light reflecting three or four times inside drops. Rainbows are more common in tropical areas and near waterfalls, and lunar rainbows called moonbows can also occur at night when moonlight interacts with water in a similar manner.
2. Where we can see more rainbows?
The Earth is the only planet, where rainbows are possible.
3. Each raindrop makes its own rainbow but it needs
millions of raindrops to see the rainbow.
4. Very rarely light can be reflected 3 or 4 times
within a water droplet which produces even fainter
tertiary(third) and quaternary(fourth) rainbows in the
direction of the Sun.
You can see more rainbows in tropical locations and
by waterfalls.
5. Can we see the rainbow at night?
Yes, we can. A moonbow (lunar
rainbow or white rainbow), is a
rainbow produced by moonlight
rather than sunlight. It is caused
by the refraction of light in many
water droplets, such as a rain
shower or a waterfall, and is
always positioned in the opposite
part of the sky from the moon
relative to the observer.
