General knowledge 1 Facts about colour

 

1. How many colours are there  in a rainbow?

            There are seven colours in a rainbow. Red, Orange, Yellow, Green, Blue, Indigo, and Violet.

 

2. Which colours are use for printing colour images and words?

            For printing colour images and word on the paper four colours are used; Yellow, Cyan (blue), Magenta (red) and Black.

 

3. How the sky changes colour?

            Gases and residue in the air make the various tones in daylight dissipate so the sky changes tone. By day the climate dissipates blue light towards earth so the sky looks blue. At nightfall when daylight has more environment to travel box before it arrives at the outer layer of the earth, red light is dissipated so the sky looks orange red.

 

4. What are primary colours?

            Primary colours are the main colours which are mixed to created secondary colours. Red, yellow and blue are primary colours. Red and yellow make orange. Blue and yellow make green. Red and blue make purple.

 

5. How do our eyes identify colours?

            Our eyes have a special organ that helps us to see colours. It is the retina. The retina in our eyes has two kinds of receptors cones and rods. They are also called photoreceptors.

 

6. How do animals see colours?

            In spite of the fact that it's basically impossible to genuinely know whether creatures really see tones, researchers have inspected the cones inside their eyes and thought about what colors they could see. There are exceptional tests to sort out this. The outcomes from these tests and many analyses have shown that creatures can see tones. In any case, various creatures have various types of shading vision. While certain creatures can't see many tones and have unfortunate shading vision, a few creatures have astonishing shading vision.

 

7. How do animals use colour?

            Some animals have similar coloured skin or fur to their habitats so they cannot be seen easily. Other animals use colours so they can easily bee seen.