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Q.

Colours of the spectrum cannot be combined to form a white light. This statement is correct or not?


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a

True

b

False 

answer is B.

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Detailed Solution

No, it is not true that Colours of the spectrum cannot be combined to form a white light.
The coloured rays obtained in the spectrum of white light produced by a glass prism can be recombined into white light again if a second identical prism is placed in an inverted position with respect to first prism.
What is dispersion of white light Draw a labelled - TutorixDispersion of light is known as the splitting of white light into a band of seven colours.  Through recombination of coloured light we can get ray of white light.
 
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