Spain : I experiment. Decomposition of the white light. From Spain

Pupils of 6th level are working with the light


The white light is compound for the colors that fix the rainbow, being the empty darkness of these. The light, to pass through the raindrops, gets diffracted, doing that the different colours scatter .












This phenomenon was discovered by Isaac Newton ( more scientist known by the fall of the apple, germ of the law of gravity ) in the second half of the century XVII.
The set of colours ( red, orange, yellow, green, blue, bluing and violet ), that always show up in the same order, is called the specter.













Colours Top ( Colour Record of Newton )

We are going to check this fact with a simple experiment .

Only you will need :

• a white pasteboard


• a pencil


• a compass


• a carrier


• felt-tip pens with the colors that fix the rainbow


• scissors

The steps that you must follow will be :

1. Utilizing the compass, you will draw a circle of 5 cm of radius

2. You will separate the circle at seven sectors, each one from ones 51º

3. Each one of the sectors you will have to colour it with the colours: Red, orange, yellow, green, blue, bluing (indago) and violet.

4. In the centre of the circle, you will insert the pencil, that you have previously sharpened .

5. Finally, you will have to turn the record as fast as you can.

Snooper!, When the record will turn to a great velocity, the colours do not stand out, doing the fact that the record appear whitish, the bigger velocity and the election of the adequate colours will do that the whitish be whiter.