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Question


Which among the following disc's appear white when it is roataing.


Options:
A .   Aristotle's disc
B .   Faraday's disc
C .   Galileo's disc
D .   Newton's disc
Answer: Option D
:
D
Newton's disc has different segments painted in different colours. They are painted in the order of  Violet, Indigo, Blue, Green, Yellow, Orange and Red. When the disc is rotating, all the colours appear to be white. Isaac Newton used this disc to demonstrate that white light is a combination of the seven different colours.
Which Among The Following Disc's Appear White When It Is Roa...

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