Ignorance is Bliss


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So, one thing that I have always wondered, is why we know so little about how the things around us work.  We use televisions, cell phones, laptops, the internet, etc. every single day and most of us have no clue how any of these things work.  In psychology, they call this idea Recipe Knowledge, which simply means that we use things without knowing how they work.  So for one of my blogs, I decided that I would help to clarify the inner workings of one of these such devices and give recipe knowledge a little kick in the pants.

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How everything works according to Recipe Knowledge.

How color televisions work:

The most important thing to understand about how color televisions work is how color mixes with lights.  Unlike on paper, color mixing using lighting is very different.  For example, when using stage lights, using a green light and a red light together, creates yellow light.  This is because our brain mixes the two colors, creating a new color.  This is the basic idea behind how color televisions work.  

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Within the TV, electron beams light up phosphors of three different colors.  When you are up close to the television, the colors simply appear like tricolored dots.  As you step back, the colors begin to mix together and create the spectrum of colors that appear on our televisions.  The color is dependent on which of the three phosphors are lit, and at what brightness.  In order to create pictures, certain electron beams need to be activated at the precise time blend the colors in just the right way that the desired color appears when needed.
These electron beams are excited by the electricity running through the television and the activated magnetic fields within the television.  The satellite signal that we receive/the information contained on DVDs is the correct coding for these electron beams so that they light up the phosphors at the precise time. While this doesn't hold true for plasma screens which operate using a different mechanism, most televisions and computers use this technology to create video.

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You probably use a television everyday, but do you know how it works?


So next time you use something and you have no clue how it works, take a few minutes and find out, heck, make it one of your blogs for the week.  

Only YOU can prevent Recipe Knowledge.

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2 Comments

Wow! This is a great post. I never really paid too much attention to how the television works. I usually just plop down right in front of it not thinking about what is actually going on inside the television. Here is a great article by How it works that explains and has some videos on how televisions can affect your brain and how watching a lot of television could cause you to report more ghost sightings because of watching a large amount of television. http://electronics.howstuffworks.com/tv6.htm

Agreed. this was a very interesting post. Most individuals just sit in front of it without thinking how it actually works. Here is an article related to the statement regarding Ghost sightings. It talks about what television does to the mind of young children. Study was conducted by the University of Michigan Medical Program. http://www.med.umich.edu/yourchild/topics/tv.htm

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