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Why are the 'danger signal' lights red i...

Why are the 'danger signal' lights red in colour ?

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Why are 'danger' signal lights red in colour?

Why are danger signals red in colour ?

Knowledge Check

  • The danger signals are red in colour because it is :

    A
    strongly scattered by fog or smoke
    B
    least scattered by fog or smoke
    C
    least obsorbed by fog or smoke
    D
    strongly absorbed by fog or smoke

  • Why does the surface of the planet Mars appear red in colour?

    A
    Presence of acids in its atmosphere
    B
    Presence of iron oxide on its surface
    C
    Presence of dust particles in its atmosphere
    D
    Presence of water on its surface

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