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| We pulled the curtains in the whare kai to make it dark. Next we aimed our torches at the blank side of a CD. We found that a rainbow reflected onto the white wall. |
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The white light from the torch is made up of seven colours. The CD separates the white light into the seven colours. They then reflect onto the wall.
A CD is made of aluminium and is covered with a clear coat of plastic. There are ridges in the metal which the light reflects off.
We also put a mirror in a shallow tray of water and saw again the colours of the rainbow reflected on our ceiling.
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Wow that looks very interesting. Did you try this experiment outside with a hose and sunlight to see if you can get the right angle to make a rainbow too?
ReplyDeleteWe will try that this week if we have a sunny day!
DeleteThat's very interesting Zara.Have fun.
ReplyDeletethat is some experiment.
from Nanny
cool cd rainbows everyone. Franky, Archie and Daddy.
ReplyDelete