why when you mix three different colors the new color you see is brighter than the original colors you mixed

Mixing colored lights & mixing colored paints. The primary colors of light are also known as the additive colors, because, when you add these three colors of light (red, green and blue) your brain perceives white light. The primary colors of paints, however, are known as subtractive colors.

Explanation:

Your well-wisher

the objects have the same charge.