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Q.

Is it true that colours of the spectrum cannot be combined to form white light?


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a

True

b

False 

answer is B.

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Detailed Solution

The above statement is false.
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 the 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 the recombination of coloured light, we can get a ray of white light.
The correct statement would be that colours of the spectrum can be combined to form white light.
 
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Is it true that colours of the spectrum cannot be combined to form white light?