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Why can visual warnings be weaker than sound warnings in dense fog?

Answer and explanation

Correct answer: Tiny droplets scatter light and reduce visibility

Correct answer: A. Dense fog contains many tiny water droplets suspended near the ground. When light from a lamp, sign, vehicle, or other visual signal meets these droplets, it is scattered in different directions. The contrast and clarity of the signal are reduced, so a person cannot see as far or identify the warning as easily. A sound warning does not depend on a clear line of sight in the same way, although its usefulness can also depend on distance, background noise, and other conditions. B is physically meaningless, C is the opposite of fog composition, and D is not a real effect of fog. Memory cue: fog scatters light and shortens sight distance, which is why transport safety needs extra care.

Related tags

Dense FogVisibilityLight ScatteringTransport SafetyForms Of Condensation: DewFrostFogAnd MistForms Of Condensation Dew Frost Fog And MistWater In The AtmosphereGeography

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