3B Scientific SEK Optics - Manual (Page 69)

Exercise
Examine the operating principle of a slide projector!
What do we need?
1 Optical lamp
with power supply unit
1 Base plate
2 Focusing lenses “+50”
1 Slide
1 Aperture holder
1 Screen
1 Mask
additionally required:
1 Ruler
Conducting the experiment
1. Attach the mask to the base plate!
2. Place the optical lamp on the left side of the base plate, so that the light emerges conically to the
right!
3. Place the screen to the extreme right outside the base plate!
4. Place the “+50” lens in front of the optical lamp! Insert the slide into the aperture holder and place
both in front of the “+50” lens!
5. Place the second “+50” lens between the slide and the screen as marked on the mask!
6. Move the lens until the image on the screen is focussed!
7. Describe your observations and name the features of the image!
8. Name the parts of a slide projector!
9. Explain how the image is produced by the projector!
ELWE Physical experiments for education in natural science and engineering
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1 SEG - OP 6.2 Slide Projector