What causes rainbows?

Question

anonymous · Answer

Urgent!!

anonymous · Answer

انكسار الضوء الابيض ينتج عنه الوان الطيف السبعة وهو قوس قزح

anonymous · Answer

refraction

anonymous · Answer

Rainbow is caused by light being refracted while entering a droplet of water, then reflected inside on the back of the droplet and refracted again when leaving it. and in this way it produces colours

anonymous · Answer

In a rainbow, raindrops in the air act as tiny prisms. Light enters the raindrop, reflects off of the side of the drop and exits. In the process, it is broken into a spectrum(band of colours) just like it is in a triangular glass prism.

anonymous · Answer

attachment

anonymous · Answer

http://en.wikipedia.org/wiki/Rainbow#Explanation

jamesj · Answer

Here's a great lecture on the topic: http://ocw.mit.edu/courses/physics/8-02-electricity-and-magnetism-spring-2002/video-lectures/lecture-31-rainbows/