name the device used to a split white light into 7 colours
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A Glass Prism.
It is a device used to split white light into seven colors. It has 2 triangular ends and 3 rectangular sides which help in splitting the white ray of light into a band of 7 colors, also known as spectrum.
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Answer:
GLASS PRISM.
Explanation:
Glass prism is a device or a object which has two triangular ends and three rectangular sides and disperse ray of white light passing through it into band of seven colours called spectrum.
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