"can anyone answer im looking to with no results"
The reason you're not getting any answers is that no one "studies rainbows". Rainbows have been essentially completely explained, and we know just about everything there is to know about them, so as you can imagine there's not a great deal of interest in studying them.
However, as always, for scientific terminology Latin is our friend. If there were such a thing as a scientist who studied rainbows, the term would be "iridologist." It sounds almost like a real science, doesn't it?
There's only one problem: the term is already in use for a pseudo-scientific medical practice (aka "quackery") in which the patterns and colors in the iris of the eye are used to pretend to "diagnose" medical conditions. So any putative rainbow-studiers would have to come up with another term, or be forced to constantly explain that they were from an entirely different pseudo-science.
the study of rainbows is called Spectroscopy
Gay
Gay
a parasitologist or refratorologist
Rainman ( or Dustin Hoffman)
By the majority of English speakers, they're called "rainbows".
A person who studies the planets and stars is an astrologist.
Someone who studies the planet Mars is called an areologist.
a parasitologist or refratorologist
The Person Who studies about mamals , he is called mamalogist....
Rainman ( or Dustin Hoffman)
A person who studies volcanoes is called a volcanologist.
A person who studies the grass and soil, etc. is called a Agrostologist
A person who studies or writes history is called a historian.
A person who studies the mind and behavior is called a psychologist.
A person who studies geology is a geologist.
A person who studies culture is called an anthropologist.
By the majority of English speakers, they're called "rainbows".
A person who studies bees is called an apiologist.
a person that studies gems is called a gemologist.