rainbows,

  • Rainbows

    You might have seen a rainbow, that arch of colours visible in the sky, but do you know what it is?
     

    What is a rainbow?

     
    A rainbow appears when sunlight and water meet. They are caused by the refraction and dispersion of the sun's light by rain or other water droplets in the atmosphere. Rainbows can be seen not just when it's raining but also on misty or foggy days, in the spray of a waterfall, and even in dew, basically they can appear whenever there are water droplets in the air and there is sunlight shining from behind at the right angle.  It's called light refraction, and on a sunny day, with a hosepipe, you can even create your own rainbow in the garden.