3B Scientific SEK Optics - Manual (Page 77)

Exercise
Examine what colours white light is composed of!
What do we need?
1 Optical lamp
with power supply unit
1 Base plate
1 Focusing lens “+100”
1 Focusing lens “+50”
1 Aperture holder
1 Single-slot aperture
1 Prism
1 Screen
1 Plane-parallel plate as support
1 Mask
Conducting the experiment
1. Attach the mask to the base plate! Place the optical lamp on the left side of the base plate, so that
the light emerges conically to the right!
2. Place the screen approx. 50 cm off the base plate! Place the “+50” lens in front of the optical lamp!
3. Insert the single-slot aperture into the aperture holder, which is placed in front of the lens!
4. Place the “+100” focusing lens between the aperture holder and the screen with a distance of
10 cm to the optical lamp! Project the slot with the lens and focus it!
5. Place the prism with the plane-parallel plate as a support onto the spot marked on the base plate!
6. Move the screen to the side until you can see the full spectrum on the screen!
7. Record the colours and the order of colours! Sketch the beam path!
8. Describe the design and the operating principle of a spectroscopic apparatus!
9. Give examples for the colour splitting which you could see in everyday life!
ELWE Physical experiments for education in natural science and engineering
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1 SEG - OP 7.1 Colour Splitting with a Prism