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We see and use colour in our everyday lives. Painters and artists use colour to illustrate beautiful works of art. Designers and architects use colour to make their works more eye-popping and stunning. Website designers, car designers, house designers, clothing designers all use colour too for the same purpose. Many other thousands of jobs use colour. Children and students use colours for drawings, posters, and projects. Colour is an important aspect that affects our daily lives.
In the old times, people thought that we see colour because it is added to light. An apple would be red because people at these times thought that light struck the apple and the apple added red to it. The light then became red and got reflected off the apple and the people could see that the apple was red. However, in the seventeenth century, Sir Isaac Newton, a famous English scientist, told everyone that light itself contained the colours. To prove his theory, Newton did a experiment, using a prism and a ray of light. The ray of light shined through the prism, and the colours emerged from the end. To further prove his theory, Sir Isaac Newton then put an upside-down prism next to the first one. The ray of light then passed through the first one and then separated into colours. The colours then hit the second prism and was merged into a single ray of light again. This determined that colour was not added to light, instead the colours were inside the light already.
When light passes through a prism, the light gets separated into colours. This arrangement of colours that appears when a ray of light passes through a prism is called a spectrum.
When a beam of light hits a prism, the light will be separated into colours.
In the next section, ‘Causes of Colours’, you will see why humans see colour. You will learn why humans would see a red apple. So, go to ‘Causes of Colours’ through the side menu or click here.
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