these new projectors come as highly premium offerings starting at $7,999. These models use a three chip 3LCD laser array ...

The best ultra short throw projectors, or UST for short, can beam an ultra-large picture from ... and some models are packaged with an ambient light rejecting (ALR) screen that uses a special ...

Place the overhead projector in the back ... distances because they are points of light. Give each student a ball and string. Ask them to find a star beam by moving their hands in the area between ...