Ответ:
1) Colour wheel - a circle with different coloured sectors used to show the relationship between colours.
2) Primary colour - one of any pair of colours, such as yellow and blue, that give white or grey when mixed in the correct proportions.
3) Secondary colour - a colour resulting from the mixing of two pirmary colours.
4) Complementary colour - any of the group of colours from which all other colours can be obtained by mixing.
5) Optical distortion - change in the shape of an image.