What is primary colours?

Correct option is D

Primary colours are the basic colours that cannot be formed by mixing other colours. In the context of additive colour mixing (light), the primary colours are red, green, and blue (RGB). These colours are the foundation of all other colours in the visible spectrum when mixed in different proportions.

In the context of subtractive colour mixing (pigments or paints), the primary colours are cyan, magenta, and yellow (CMY), which are used in printing and painting.

Information Booster

• Additive Primary Colours (RGB):
  • Red, Green, and Blue.
  • Used in electronic screens like TVs, monitors, and projectors.
  • When combined, they produce white light.
• Subtractive Primary Colours (CMY):
  • Cyan, Magenta, and Yellow.
  • Used in printing and pigment mixing.
  • When combined, they absorb light and produce black.
• Significance: Primary colours are fundamental in understanding the physics of light and the art of colour mixing.

Additional Knowledge

• (a) Colour of the rainbow – Incorrect. Rainbow colours (VIBGYOR) are secondary and tertiary colours, formed by the dispersion of light.
• (b) Colour found in nature – Incorrect. Many natural colours are combinations of primary and secondary colours.
• (c) Colour in the spectrum of white light – Incorrect. The spectrum contains seven colours (VIBGYOR), not just primary colours.
• (d) Colours which cannot be produced by mixing other colours – Correct. Primary colours are unique and cannot be derived by combining other colours.