How OHP Is Worked
An overhead projector (OHP) is adevice that casts a transparency image to a screen. The process of using an OHP includes the following steps. First, an OHP is placed on atable positioned sevral feed from a screen, and it pluged in to an electrcal socket. Next, a transparency is placed face up on the plate glass surface of the OHP, and the switch is turned on. Then height of the OHP is adjusted so that image is centered on the screen, and a focus knob is turned until projecting clear image. finally, the transparency is replaced with next transparency, and the sixth step is repeated.
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