Q. 55.0( 2 Votes )
What will happen when white light passes through the prism?
When a beam of white light is incident on one of the refracting surface of the prism, it splits onto a band of seven colours. This phenomenon exhibited by the prism is called dispersion of light. The band of the coloured component of the light is called as a spectrum.
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A beam of white light falling on a glass prism gets split up into seven colours marked 1 to 7 as shown in the diagram.
A student makes the following statements about the spectrum observed on the screen.
i. The colours at positions marked 3 and 5 are similar to the colour of the sky and the core of a hard boiled egg respectively.
Is the above statement made by the student correct or incorrect? Justify.
ii. Which two positions correspond closely to the colour of
(a) a solution of potassium permanganate?
(b) ‘danger’ or stop signal lights?
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