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Question
A disc in which seven rainbow colours equally spread over an area, which on rotation, fades to white colour is called:
A disc in which seven rainbow colours equally spread over an area, which on rotation, fades to white colour is called:
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Solution
The correct option is A Newton’s disc
Newton's disc is a disc with sectors which are painted in rainbow colours, i.e. violet, indigo, blue, green, yellow, orange and red, in that order. When the disc is rotated, the colors fade to white.
Isaac Newton used this disc to demonstrate that white light is a combination of the seven different colours found in a rainbow.
Newton’s disc
Newton's disc is a disc with sectors which are painted in rainbow colours, i.e. violet, indigo, blue, green, yellow, orange and red, in that order. When the disc is rotated, the colors fade to white.
Isaac Newton used this disc to demonstrate that white light is a combination of the seven different colours found in a rainbow.
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