38. Answer the following questions,
(1) What is atmospheric rarefaction? Explain.
( 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 statement made by the student correct
or incorrect? Justify.
(b) Which two positions correspond closely to the colour of -
0 A solution of potassium permanganate?
(ii) "Danger' or stop signal lights?
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Answer:
bending of light for many times because of different medium and correct, first is closer, for dangerous red is used because it least scatters
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