Why are rainbows half circles ? L ight and raindrops work together to create a ring of coloured light opposite the sun. We see part of that ring as the curved arc of a rainbow. Here's how it works: the sunlight that shines …

What is the speed of a falling raindrop ? It depends on the size and weight of the raindrop how fast it falls: the heavier, the faster. At sea level, a large raindrop about 5 millimeters across (house-fly size) falls at the r…

Why is the sky blue ? Sky Blue Transmitted light (from the sun, light bulbs, fire, etc) is made up of a spectrum of colours. The longest wavelengths of light are on the red end of the spectrum and the shortest wavelengths are o…