OBSERVATION AND IDEAL

Projector help to communicate by enlarging  image or video on your  computer to be wide enough on a screen or white wall in a room where large number of  people can see it. The whole idea of a projector is to convert a small image into a much larger one so that people can see it well.

Like camera every projector has zoom and focus key these keys help to set projector to become more brighter and clear. In a big house where there great number of people it is recommended  to use big size screen 96' inches in  case of that the projector will move  little bit far from the screen in order to get more accurate zoom  size of the  screen. 

Like a torch light  it is  quite obvious that the  more closer  projector rays is to the screen it  become smaller and the more farther projector rays is from the screen it become larger. The projector zoom key helps but it has some extent limit level where it will stop and depends on types the projector