7.6

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7.6 Principle of subtraction of coloured lights to explain the appearance of coloured objects 1) The colour of an opaque object depends on the colour of the light that it reflects. 2) An object of a primary colour ( red, blue, green ) only reflects light of the same colour. For example, a blue object only reflects blue light. 3) An object of a secondary colour ( yellow, magenta, cyan ) reflects light of the same colour and the primary colours that form it. For example, a magenta object reflect
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  7.6 Principle of subtraction ofcoloured lights to explain theappearance of colouredobjects  1)The colour of an opaque objectdepends on the colour of the light thatit reflects.2)An object of a primary colour(red, blue,green) onlyreflects light of the same colour. For example, a blueobject only reflects blue light.3)An object of a secondary colour (yellow, magenta, cyan ) reflects lightof the same colour and the primarycolours that form it. For example, amagenta object reflects magenta, redand blue lights.  4)A white object appears whitein white light because a white objectreflects all colours.5)A black object appears black because all coloured lights are absorbed by it.No coloured light is reflected.
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