Read the passage carefully and answer the questions that follow

Rainbows are often seen when the sun comes out after or during a rainstorm. Rainbows are caused when sunlight shines through drops of water in the sky at a specific angle. When white sunlight enters a raindrop, it exits the raindrop a different colour. When light exits lots of different raindrops at different angles, it produces the red, orange, yellow, green' blue, indigo and violet that you see in a rainbow. Together, these colours are known as the spectrum. These colours can sometimes be seen in waterfall and fountains as well. Did you know that there are double rainbows? In a double rainbow, light reflects twice inside water droplets and forms two arcs. In most double rainbows, the colours of the top arc are opposite from those in the bottom arc. In other words, the order of colours starts with purple on top and ends with the red on bottom. Believe it or not. rainbows sometimes appear as white arcs at night. These rainbows are caned moonbows. Moonbows are caused by moonlight (rather than sunlight) shining through drops of water.