Why are danger signals generally red in colour?

Options

  • A. Red light is scattered the least
  • B. Red light is scattered the most
  • C. Red light has the highest frequency
  • D. Red light cannot travel through air
  • E. None of the above

Correct Answer (Detailed Explanation is Below)

A. Red light is scattered the least

Detailed Explanation

Among visible wavelengths, red light is scattered less by the atmosphere than shorter-wavelength light, so it can be seen from greater distances.