Answer :
Final answer:
Class A and C lights, generally related to aviation or marine operations, should be visible at a distance of 2000 feet at night. The intensity of these lights diminishes as the distance from the source increases, as per the inverse square law.
Explanation:
The visibility of class A and C lighting at night, more likely related to aviation or marine regulations, is contingent on a variety of factors including inherent light intensity, atmospheric conditions, and the observer's visual acuity. However, a clear-cut answer to your question, the distance from which class A and C lighting should be visible at night is Option C: 2000 feet. This is based on standard regulations that dictate the necessary visibility distance for safety purposes.
It's essential to understand, as per the principle of inverse square law, the intensity of light diminishes as the distance from the source increases. Assuming an ideal case with no obstructions and perfect viewing conditions, if we stand twice as far from the source, our eyes will intercept four times less light. So, a more intense light source is necessary for it to be visible over greater distances.
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