Q. Red light is used in traffic signals because

  • (A) It is beautiful
  • (B) It is visible to people even with bad eyesight
  • (C) It has the longest wavelength
  • (D) None of these
✅ Correct Answer: (C) It has the longest wavelength

Published by Ram Sharma ⭐ 193.88K Points at 26-Nov-2021 10:32 pm in Physics

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