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.