Name: White Light: Mixture of Seven Colours
Uploaded: 2019-07-19
Duration: 4 min 43 s
Description: What is visible light, and what are its characteristics? Watch this video that illustrates the concept of splitting up of white light with a fun activity.

Question

Many television sets and computer monitors produce the range of colours on monitor by the use of red, green and blue light emittimg phosphors. Why?

Accepted Answer

Color from a computer monitor or a TV screen results from a different process than that due to reflection or transmission by a solid or solution. A monitor or TV screen generates three colors of light (red, green, and blue) and the different colors we see are due to different combinations and intensities of these three primary colors. Each pixel on a computer screen is composed of three small dots of compounds called phosphors surrounded by a black mask. The phosphors emit light when struck by the electron beams produced by the electron guns at the rear of the tube. The three separate phosphors produce red, green, and blue light, respectively.

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