mnurut aq engga mungkin deh..
abisnya, pelangi itu kan hasil dari terbiasnya cahaya matahari atau sejenisnya gt..

bahkan ada juga yang bilang untuk mendapatkan emas di ujung pelangi itu, kita harus menaiki pelangi tersebut dari ujung yang berlainan..

kalau pelangi sendiri adalah cahaya, bagaimana bisa ia dinaiki??

tp kemungkinan nya kecil sekali...

gw pernah liat pelangi yang berbentuk lingkaran sempurna... berarti enggak punya kaki kan?

pelangi ga punya ujung... karana bentuk aslinya adalah lingkaran sempurna... cuma pandangan manusia sangat terbatas..

....kalo gitu kenapa pelangi bentuknya lingkaran...kok ngga kotak atau segitiga, atau lainnya.....

karena matahari bulat. coba kalo matahari bentuknya segitiga pasti pelanginya juga segitiga

yg berbentuk lingkaran di sekeliling benda bercahaya itu namanya halo. kalo di kasus matahari (dan juga bulan) seringkali terjadi karena pengaruh kristal es di awan tinggi (cirrus).
bentuk pelangi yang lain:
Circumhorizontal arc



Circumzenithal arc

ini penjelasan pembentukannya dari wikipedia (link ada di atas):

A circumhorizontal arc (also popularly called fire rainbow) is a rare optical phenomenon. In order to be observed, the sun must be very high in the sky, at an elevation of 57.8° (90 -32.2°) or more, and can only occur in the presence of cirrus clouds. As a result it cannot be observed at locations north of 55°N or south of 55°S, although occasionally at higher latitudes from mountains.[1] In areas of Northern Europe it can only be observed around the time of the Summer solstice.[2] If cloud conditions are right it is seen along the horizon on the same side of the sky as the sun. It reaches its maximum intensity at a sun elevation of 67.9° .

The arc is formed as light rays enter the horizontally-oriented flat hexagon crystals through a vertical side face and exit through the horizontal bottom face. It is the 90° inclination that produces the well-separated rainbow-like colours and, if the crystal alignment is just right, makes the entire cirrus cloud appear to shine like an undulating rainbow.[1][3]

Although quite rare, it is not the rarest of all natural phenomenon. The Kern arc and Lowitz arc are even rarer.

A circumhorizontal arc can be confused with an infralateral arc when the sun is high in the sky; the former is always oriented horizontally whereas the latter is oriented as a section of a rainbow, e.g. as an arc stretching upwards from the horizon.[3]

One particularly fine example was photographed over northwestern Idaho on June 3, 2006, and was reported in both the New Scientist[4] and the Daily Mail (the latter under the caption "flaming rainbow"). As the event was eventually featured on National Geographic News,[5] the news quickly spread over the internet.