This is because white has no color, so it is vulnerable to any color you can think of. The yellow light will overtake the plain white color, so it will look as if it was yellow. This is why when you shine yellow light on a white surface, it looks yellow instead of white.
In a democracy the people respects individual rights of citizens and right to own property and means of production where as communism calls for the government to tale control of all capital and industry in the country.
