Question

what happen if we rotate a newton disk rotated at a great speed

Answer 1

it would be like a disco ball ,along these lines Isaac Newton exhibited that white light is a blend of the seven unique hues found in a rainbow.

Answer 2

White colour will be visible.
Explanation:
A Newton disc, is a disc invented by Isaac Newton with seven segments in rainbow colours. When the disc is rotated, the colors fade to white; In this way Isaac Newton demonstrated that white light is a combination of the seven different colours found in a rainbow.