The water particles and refracted light that form the rainbow you see can be miles away and are too distant to touch. However, it is possible to touch the water particles and refracted light (if you agree that you can touch light) of a rainbow that someone else is viewing.
Rainbow is formed just because of dispersion of white light due to raindrops. Technically different colours are light waves of different wavelengths. Since we can not touch light, so we can not even touch a rainbow.
At some point you will exit the area with water droplets and the rainbow will disappear, because there are no droplets to bounce the light at you. This is why you can't actually reach the rainbow. However, to outside observer it may easily appear that you are where the rainbow seems to be.
You can never get to the end of a rainbow
Because a rainbow is based on the orientation of the observer (you) and the light source (the sun), when you move, the rainbow will move, too.
In other words, a rainbow is an optical illusion which cannot be physically touched nor approached. Even if you could touch it I don't think you would be able to feel it since it is just light.
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.
No. While none exist to date it would be possible for a dead star to have cooled to a safe temperature.
What is at the end of a rainbow? Answer: The letter "W".
No. A rainbow is a visual phenomenon.
In most cases, rainbows are semicircular. Yet on rare occasions, it is possible to spot a full circle rainbow. This type of rainbow typically occurs in high altitude areas. At lower altitudes, the position of the sun prevents a full circle from being formed.
A Hawaiian helicopter pilot saw the rare sight while surveying a canyon. Full rainbows are rare, but not unheard of.
Surprisingly, this phenomenon is actually relatively common, especially at times when the sun is low in the sky such as in the early morning or late afternoon. The second rainbow is fainter and more 'pastel' in tone than the primary rainbow because more light escapes from two reflections compared to one.
It is impossible to say how far away is a rainbow because it has no distance, no size or indeed real existence. It is purely a collection of rays from glinting water drops that happen to be intercepted by your eye.
The old folktales tell us that there is a pot of gold hidden where the end of any rainbow touches the earth. Unfortunately, science tells us that rainbows do not have an end since their arch shape is an illusion!
Few people have ever claimed to see three rainbows arcing through the sky at once. In fact, scientific reports of these phenomena, called tertiary rainbows, were so rare -- only five in 250 years -- that until now many scientists believed sightings were as fanciful as Leprechaun's gold at a rainbow's end.
A rainbow isn't a fixed object that hangs in the sky. It's an illusion formed between the sunshine, the rain and your eyes. Light bounces out of the raindrops at an angle of 40° for red light, and 42° for blue. And that's true wherever you stand, so as you move, the rainbow moves too and you can never catch it.
So-called 'supernumerary rainbows' only form when falling water droplets are all nearly exactly the same size, according to. The result is a series of three or more rainbows hanging in the sky that can sometimes stretch to five in 'exceptional' circumstances, according to one expert.
A moonbow (sometimes known as a lunar rainbow) is an optical phenomenon caused when the light from the moon is refracted through water droplets in the air. The amount of light available even from the brightest full moon is far less than that produced by the sun so moonbows are incredibly faint and very rarely seen.
Rainbows are formed when sunlight is scattered from raindrops into the eyes of an observer. Most raindrops are spherical rather than the often depicted 'teardrop' shape and it is this spherical shape that provides the conditions for a rainbow to be seen.
A Sign of Hope and Promise
For many people, the appearance of a double rainbow is a reminder that no matter how dark and difficult life may seem, there is always hope for a better tomorrow.
Early history. The earliest possible recorded supernova, known as HB9, could have been viewed and recorded by unknown Indian observers in 4500±1000 BCE. In the year 185 CE, astronomers recorded the appearance of a bright star in the sky, and observed that it took about eight months to fade from the sky.
To build an armored space station the size of the moon would pollute our atmosphere to a point that Earth would be uninhabitable. The Death Star would also be too heavy to remain in low orbit without any form of propulsion. It's possible to push it higher, but we would need a “prohibitive” amount of rocket fuel.
This pair of visible-light and near-infrared photos from NASA's Hubble Space Telescope shows the giant star N6946-BH1 before and after it vanished out of sight by imploding to form a black hole.
So millions of different raindrops create the new rainbow with the new angles. In order for the angles to work out, the raindrops have to be a certain distance from your eyes. So no matter how you move, the rainbow will always be the same distance away from you. That's why you can never reach the end of the rainbow.