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eye of the whole spectrum of radiations falling upon the object and returned to the eye after scattering or diffusion by the material of which it is composed."
Colour of any object will depend upon three things : nature of the falling light, absorbtion of certain wavelenghts by the object and reflection of the balance wavelength (s). The combined effect of all these on our eyes is the colour of the object.
Transparent and Opaque Objects
When light falls on a transparent object, a small portion is absorbed, some is reflected and a major portion is transmitted through it. An opaque object absorbs some portion of the falling light and reflects the rest. The colour of an opaque object will depend upon the colour of the falling light and the portions which are absorbed and reflected. Thus every object absorbs all the wavelengths except that of its own colour.
Primary and Complementary Colours
Blue, yellow and red are called primary colours. While all other colours can be obtained by mixing these in different proportion, primary colours cannot be obtained by mixing. When two colours are mixed to obtain a third one, the two are called complementary to each other.
Colour in Astronomy
Colour is a boon to inquisitive mankind in general and scientists in particular. It has played an important role in the spectacular advancement of some of the sciences.
The secrets of the universe are written largely in light and can be known by deciphering the light itself. As stated earlier, the spectral analysis of sunlight shows a complete
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