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when the white ray of light passes through triangular prism ..the white ray spread into seven different colours in different places as per their speed . As the speed of red ray is high , it begins in 1st positions and volient has less speed , it is in last positions
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the white ray of light passes through triangular prism ..the white ray spread into seven different colours in different places as per their speed . As the speed of red ray is high , it begins in 1st positions and volient has less speed , it is in last positions.
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