Diamond Pakistani Girls Jewelry Collection 13

Diamond Pakistani Girls Jewellery Collection. 
Farzana Diamond Jewellery In the beautiful Diamond Jewellery 18k and 21k gold stylish  Bridal and wedding Jewellery styles it women choice is marriage the your choice is great honor for us .in diamond jewellrery.
 By Farzana Aamir)
12.-3 COLOUR, COLOUR FILTERS, AND THE DICHROSCOPE

When even the most practised eye may find it difficult to distinguish between stone of difficult species but of very similar colour, simple instruments can sometimes be used to 'analyes' the colour in one way or another and make the separation simple. what we call 'white' light, i.e. light from the sun or other incandescent bodies, is composed of a mixture of all the colours of the rainbow. 

newton, in the year of the great fire of london (1666), was the first to show that sunlight has a composite nature. he analysed a narrow beam of light that passed through a chink in the shutter into his darkened room, by the simple expedient of placing a glass prism in the path of the ray. light is variously refracted by a transparent solid according to its wavelenght, the red rays, of longer wavelength, beings less deviated than the shorter, violet, waves.