I'm guessing what your asking is how projectors show an image. They have an LCD inside them which displays an image and a light shines through which projects it onto a wall.
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The best illustration of the diffusion of American popular culture is perhaps the global presence of Hollywood movies and television shows. These forms of media have successfully permeated markets worldwide, influencing the lifestyles, fashion trends, and entertainment choices of people across different cultures. Additionally, the spread of American music genres like hip-hop and pop music to international audiences further demonstrates the impact of American popular culture on a global scale.
Projectors are an excellent tool that can be used in the office and at school. This is the perfect way for everyone in the room to view the slides being shown, especially suited for presentations. Projectors aid by showing what is on a computer screen, so everyone is able to see it clearly.
Dirty Projectors was created in 2002.
Infocus projectors are made for the office, home, classroom, and for all presentation needs. Infocus projectors can also be useful in churches and the courtroom. The projectors are for presentation purposes.
LCD projectors are by far the best
Most projectors have the means to be a rear and front projection system. The only projectors that are unable to do this are the cheaper projectors you find at Office Depot used for powerpoint shows.
NEC's multimedia projectors cost from $310 to about $5,000. They also make cinema projectors which are even more expensive.
I haven't seen a retro school projectors on the market today but, If you really like the old school projectors you can get some restored projectors for a good price. anonymous@oola.com
Staples offers several styles and brands of LCD projectors online. They also carry DLP projectors which is a newer technology.
LCD projectors and DLP projectors
Gulliver thinks the political projectors are boring and out of their minds.