Light Mixing GeoGebra Model
- Parent Category: 04 Waves
- Category: 04 Light
- Created: Friday, 25 September 2015 20:45
- Last Updated: Tuesday, 20 October 2015 08:44
- Published: Friday, 25 September 2015 20:45
- Written by Loo Kang Wee
- Hits: 3910
Light Mixing Model
text taken from http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=39
Thomas Young, in the early 1800s, showed that a broad range of colours can be generated by mixing three beams of light, provided their frequencies were widely separately.
When three such beams combine to produce white light, there are called primary colours.
There is no single unique set of these primaries, nor do they have to be monochromatic.
The three components (emitted by three phosphor) that generate the whole gamut of hues seen on a colour TV set are Red, Green, Blue.
Looking through a coloured window or cloth is another story.
Yellow cloth, paper, dye, paint, and ink all selectively absorb blue and reflect what remains - yellow - and that is why they appear yellow.