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Question 37Asked in RRB JE CBT-1, 17 Dec 2024, Shift 1 (9:00 AM)

Why are danger signals typically red in colour?

  1. AThe colour red is aesthetically pleasing.
  2. BRed light has a longer wavelength and is scattered the least, making it visible from a distance.
  3. CRed light is easier to produce artificially.
  4. DRed light is more reflective than other colours.
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Correct answer: (B) Red light has a longer wavelength and is scattered the least, making it visible from a distance.

From RRB JE CBT-1 PYQ 17 Dec 2024, Shift 1 (9:00 AM)

This is question 37 of RRB JE CBT-1 PYQ 17 Dec 2024, Shift 1 (9:00 AM). See all questions of this paper with answers, or attempt the paper as a timed online test to get your score and all-India rank.