PHY ICS - The Institute of Physics in Ireland
PHY ICS - The Institute of Physics in Ireland
PHY ICS - The Institute of Physics in Ireland
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42 P H Y S I C S O N S T A G E 2<br />
EASY COLOUR 5. Tough competition<br />
Invite students to make a variety <strong>of</strong> discs with coloured segments. One way is<br />
to provide plenty <strong>of</strong> brightly coloured paper, some back<strong>in</strong>g card and scissors.<br />
If possible let some students, <strong>in</strong> school or at home, use the draw<strong>in</strong>g tools <strong>of</strong> a<br />
computer package to pr<strong>in</strong>t out circles <strong>of</strong> coloured segments. <strong>The</strong>y can guess the<br />
best shades and proportions <strong>of</strong> red, orange, yellow, green, blue, <strong>in</strong>digo and violet<br />
to <strong>in</strong>clude. Not easy – choose bright shades for a start.<br />
Now for the competitive bit: Supply a few battery powered fans (available for a<br />
few Euro <strong>in</strong> pound shops or gadget shops) and some pieces <strong>of</strong> Blue tack.<br />
Invite each group to sp<strong>in</strong> their Newton’s disc on a fan, observe all the results and<br />
award prizes to the closest approximations to white – the most successful sp<strong>in</strong> doctors!
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