3B SCIENTIFIC® PHYSICS
Operating instructions
1/03 ALF
The colour disc is used to prove that an additive mixing
of individual colours of the visible spectrum results in
the colour white.
1. Description, technical data
This plastic disc consists of segments coloured red, or-
ange, yellow, light green, dark green, light blue, dark blue
and violet. A central borehole (approx. 10 mm) allows
attachment to a motor with drive control (U11040).
Diameter: 170 mm
3B Scientific GmbH • Rudorffweg 8 • 21031 Hamburg • Germany • www.3bscientific.com • Technical amendments are possible
U15500
Colour disc
• Fit the colour disc perpendicularly on the motor with
• Turn on the motor and set it to a speed higher than 8
• At this speed, persistence of vision prevents us from
• It is advisable to illuminate the colour disc from the
2
2. Procedure
drive control and tighten the knurled screw.
revolutions per second.
being able to distinguish between the individual
colour segments, thus resulting in additive colour
mixing. For technical reasons, the resultant colour is
not white, but grey.
front by means of a lamp.
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