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Standard X
Physics
Question

Red light is used as danger signal because it is:
  1. Accepted as symbol
  2. Pleasing to the eye
  3. Sensitive to the eye
  4. Has high wavelength

A
Accepted as symbol
B
Pleasing to the eye
C
Sensitive to the eye
D
Has high wavelength
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Solution
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Red light is used as danger signal because it is having high wavelength, less scattering ,hence can travel larger distances.

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