INSTRUCTIONAL TECHNOLOGY 3(2+1)

Lesson 26 : Projected Visual Aids

Slide projector

An ordinary slide projector has a frame containing two slits into which slides are put for focusing. They are manually and continually replaced by other slides one after another.

Operation:

• Place the projector on table or on any steady support
• Set up screen in front of the projector
• Insert electric plug in outlet and switch on the lamp
• Standing at the back of the projector, insert test slide in the opening on the right hand side
• Centre the image and focus it on the screen by slowly moving the lens, to and fro
• Place the slide in the proper order so as to have the thumb mark in the upper right hand corner
• The new slide gently pushes out the previous slide on the left hand side.

Slide is a transparent photograph which can be projected onto screen by using slide projector.