YOU SAID:

A double rainbow is a phenomenon of optics that displays a spectrum of light due to the sun shining on droplets of moisture in the atmosphere.

INTO JAPANESE

二重の虹は、大気中の水滴に太陽が輝くための光のスペクトルを表示する光学現象です。

BACK INTO ENGLISH

Double Rainbow is the optical phenomenon to display the spectrum of light for the Sun to shine on the water droplets in the atmosphere.