How many colors are there in white light

Note that I did not suggest "magenta and green". That would " work " except that magenta is itself not a pure colour. The ability to simulate almost any colour using a suitable combination of red, green and blue is used for displays in televisions, computer monitors, smartphones, etc. Of what colors does white light consist? Apr 5, Explanation: Violet,indigo,blue,green,yellow orange red.

George C. It depends Explanation: White light necessarily contains a mixture of different frequencies of light, but what mix may be somewhat debatable It is difficult to know what light really is, but we can observe its effects.

An object appears colored because of the way it interacts with light. A thin line of light is called a ray; a beam is made up of many rays of light. Light is a form of energy that travels in waves. Light travels silently over long distances at a speed of , mi , km a second. It takes about eight minutes for light to travel from the sun to the earth. Some estimate that humans are able to distinguish about 10 million colours. The primary colours of light are red, green and blue.

Mixing these colours in different proportions can make all the colours of the light we see. This is how TV and computer screens work. If you look at a screen with a magnifying glass you will be able to see that only these three colours are being used. For example, red and green lights are used to make our brain perceive the image as yellow. When coloured lights are mixed together, it is called additive mixing. Red, green and blue are the primary colours for additive mixing. If all of these colours of light are shone onto a screen at the same time, you will see white.

This is different when you are mixing paints. Each colour of paint is absorbing certain colours and reflecting others. Each time another colour of paint is mixed in, there are more colours absorbed and less are reflected. The primary colours for adding paints or dyes, such as for a computer printer, are yellow, magenta and cyan. If you mix all of these colours together, you will absorb all the light and will only see black, because no light will be reflected back to your eyes.

You can easily experiment with this. Hold some coloured cellophane in front of your eyes and have a look around. Notice how some colours are changed and others look similar. Figure out which colours are being absorbed. It sometimes takes a long time for new scientific knowledge to become widespread. For example, many people used to think that dogs could only see in black and white. It is now known that dogs have two kinds of colour receptors that allow them to see yellows and purples.