W hen you hop in your car to head to work, drop your kids off at school or make a Target run, how many traffic lights do you ...

You can use a prism to split (or disperse) white light into a spectrum of colours: red, orange, yellow, green, blue, indigo and violet. Dispersed means that the colours are separated out.

Known for their ability to change color, they can be seen wearing a variety of colors, including brown, green, blue, yellow, red, black or white. Communication is an important reason behind these ...