Question

Why are tennis balls green?

Answer 1

Answer:

The human eye is most sensitive to light that we would call yellow-green, so Wilson and the other ball manufacturers began producing “optic-yellow” tennis balls to match the spectral response of our eyes.

Answer 2

Question:-

Why are tennis balls green?

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They were either green or yellow, and there was no in between. Two-thirds of people see them as yellow, but this wasn't enough. ... “The color of tennis balls falls on a border between colors that we would almost all agree are yellow and those that we would agree are green.

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