Answer :
Final answer:
An occulting light is a signal characterized by spending more time in its 'on' or 'flash' state than in its 'off' or 'eclipse' state. So, the correct answer is B. 4 sec. flash, 2 sec. eclipse, 3 sec. flash, 2 sec. eclipse.
Explanation:
An occulting light is a type of light signal that is used in many fields, including astronomy and maritime navigation.
The defining characteristic of an occulting light is that it spends more time in its 'on' state (known as its 'flash').
Than in its 'off' state (known as its 'eclipse').
This is in contrast to a flashing light which spends more time in its 'off' state than its 'on' state.
In practical terms, an occulting light might look something like this:
Flash for 4 seconds, then eclipse for 2 seconds, then flash again for 4 seconds, then eclipse for 2 seconds, and so on.
Note that regardless of the exact lengths of time for each flash and eclipse.
The important thing is that the flashes always last longer than the eclipses.
An occulting light is a navigational aid used in maritime and aeronautical applications.
It is characterized by a specific light pattern that helps sailors and pilots identify their position and avoid obstacles.
The characteristic of an occulting light is typically described in terms of its light and dark intervals.
This means that the light is visible for 4 seconds, followed by an eclipse (darkness) for 2 seconds, then another 3 seconds of light.
The finally another 2 seconds of eclipse before the pattern repeats.
This specific pattern helps mariners and aviators distinguish it from other types of lights and aids in navigation. So, the correct answer is B. 4 sec. flash, 2 sec. eclipse, 3 sec. flash, 2 sec. eclipse.
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