colour science beliefs and major colours

In 1866 sir Isaac Newton passed a beam of white light through a prism of translucent glass.The beam of light broke up in seven colours
From this experiment ,it was discovered that colours are components of light.Colours are a function of light and without light there is no colours.Havens(1998:17)defines colour as,"an element that comes from reflect light."Light from sun is actually a combination of all colours.The colours through the prism are red ,orange,yellow,green,blue,indigo and violet are called the colour spectrum.These are the colours of the rainbow.
What we perceive as colour are reflected light.In perceiving colour the physiological activities of the eye and science of electromagnetic wavelength as that work.
Therefore scientific discovery concludes that colour is formed with the strike of light or the form of matter that is reflected by light.Colour is an an Art element and is important in craft and design.Inorder to see colour the following must be present light,surface/object and the eye.
Furthermore the effects of colour found to affects moods.Researchers say different colours influence raspiratory rates,blood pressure,pulse and even anger and happiness.
Colours can be used to show the seasons ,time of the day or different conditions of weather.
Besides the scientific facts the colour as its strong meaning in various cultural beliefs.For instance in shona culture black associated with ancestral spirits and beauty, whilst white is associated with angels and holiness in christian beliefs.
Colours are arranged in a circle and 12 unique colours discovered and identified to be on the circle which is known as colour wheel.There are in three groups which are primary,secondary and tertiary colours .
Primary colours cannot be made by any mixture and these are Red,Yellow and Blue.These can be called first colours when using paints and can be mixed to make other different colours.There is no any other colour you can mix to create them.They are original colours.
On the colour wheel they are never placed together.They have some space distance.
Secondary colours are made by combining two primary colours for example :
Yellow † blue make green.
Red†Blue make Purple
Yellow †Red make Orange

Tertiary colours are products of a primary colour and an adjustment secondary colour for instance Yellow†green produce yellow green.
Red†orange produce red orange
The colour wheel is the foundation or backborne of theory of colour.It include all clour groups primary ,secondary and tertiary in a specific order.A colour wheel is a colour spectrum bent into a circle and is a guide to mixing the primary ,secondary and intermediate colours.