The interaction of sunlight with atmospheric particles gives rise to the following phenomena:
1. Blue colour of the sky.
2. Redishness of the sun at sunrise and sunset.
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.
(a) 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.
(b) Which two positions correspond closely to the colour of (i) a solution of potassium permanganate?
(ii) ‘danger’ or stop signal lights?
