A rainbow forms when sunlight is refracted twice, first when entering a raindrop and then when exiting it, and reflected once within the drop. Sunlight enters a raindrop on the side of the drop facing ...

Answer: The principal indication given by a double bow is that the raindrops that are refracting and reflecting sunlight are of medium to large size, rather than being very small or tiny droplets.

MACON, Ga. — A rainbow forms when sunlight enters a raindrop. When this happens, sunlight bounces around the raindrop and changes speed and direction. That's called refraction. These changes also ...

There are a few things you need to see a rainbow. The main things are water droplets and sunlight. The water droplets need to be illuminated by bright sunshine and they must also be in the right ...