Question

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(ii)
Take a round piece of card board of 10 cm diameter. Divide the card board in 7 equal parts.
Paint each piece of card board with the color of a rainbow. Make a hole at the centre and put
pencil inside it and make a spin. Share your experience.
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Answer 1

i have done this before but on a disc by coloring it like a rainbow by spinning it fast we get WHITE color, same thing happened with you ,its called NEWTON DISC.

Thank you for sharing such interesting things with everyone