if one of the colors in the Newton Disk will be removed ,Will it still appear white when rotated at high speed

Question

It is related to the spectrum of light.

Answer 1

Yes. We only need 3 colors to get white (Red, Green, Blue).

Answer 2

There's nothing magic about the so-called primary colors. Any two are enough for full color vision. Choosing the wavelengths well, and adding a third, just improve the resolution. It would be difficult but possible to make something like the Newton disk with two colors that would appear white. Three would make it easier.

Answer 3

Not if one of the primary colors (R,G,B) is removed. It takes all three to blend into white through "persistent vision" while spinning. If the disc has ROYGBIV, the rainbow primary colors, then removing OYIV should make no difference because the primary colors remain. [See source.]

Answer 4

In colors we have a property called saturation.

In this case the saturation will diminish. But the color- we call it still as white.

Whitness has a huge range.