CAT Verbal Ability Questions | CAT Para Jumbles questions
CAT/2000
Question . 97
DIRECTIONS FOR QUESTIONS: Arrange sentences A, B, C, and D between sentences 1 and 6 to form a logical sequence of the six sentences.
1. Security inks exploit the same principle that causes the vivid and constantly changing colours of a film of oil on water.
A. When two rays of light meet each other after being reflected from these different surfaces, they have each traveled slightly different distances.
B. The key is that the light is bouncing off two surface, that of the oil and that of the water layer below it.
C. The distance the two rays determines which wavelengths, and hence colours, interfere constructively and look bright.
D. Because light is an electromagnetic wave, the peaks and troughs of each ray then interfere either constructively, to appear bright, or destructively, to appear dim.
6. Since the distance the rays travel changes with the angle as you look at the surface, different colours look bright from different viewing angles.
Explanatory Answer
Method of solving this CAT Verbal Ability Question from Para Jumbles question
(b) Sentence B is the first choice as it explains the principle given in sentence number 1, this is followed by A which further clarifies it and then by D, which is again a further clarification of the principle and last is C, which is the logical conclusion of the principle.