Discs $A$ and $B$ are painted as in figure. It is rotated very fast in the direction of the arrow.
(a) What will be the colour of:
i. disc $A$
ii. disc $B$
(b) What property of the eye makes this possible?
(c) What is the complimentary colour of red?

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Solution

(a) i. White : When color yellow and color blue in a disc is rotating with a speed, the resulting color is seems to white color.
ii. Cyan : A greenish-blue color which is one of the primary subtractive colours.
(b) This is visible due to the properrty "persistence of vision".
(c) Cyan is the complimentary color of red.

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Discs A and B are painted as in figure. It is rotated very fast in the direction of the arrow.(a) What will be the colour of: i. disc A ii. disc B(b) What property of the eye makes this possible?(c) What is the complimentary colour of red?

Discs $A$ and $B$ are painted as in figure. It is rotated very fast in the direction of the arrow.
(a) What will be the colour of:
i. disc $A$
ii. disc $B$
(b) What property of the eye makes this possible?
(c) What is the complimentary colour of red?