Final answer:
The correct answer is option C. period, which denotes the time it takes for a lighted navigational aid to complete one full cycle of light changes.
Step-by-step explanation:
The correct answer is option C. period. In physics, the term period refers to the time it takes to complete one oscillation or cycle.
In the context of a lighted aid, such as a lighthouse or navigational beacon, the period is the time required for the light to complete a full cycle of changes, which could include patterns like flashing, eclipsing, or steady-on.
Therefore, when consulting the Light List, the period is what's listed to inform mariners of the timing of these light signals.
It's important to understand that the period is the inverse of frequency, which represents the number of cycles that occur in a unit of time.
The correct answer is option C. period. In the context of a lighted aid, the period refers to the time it takes for the aid to complete a full cycle of light changes. It represents the duration of one complete cycle, which includes all the changes in the light pattern. The period is often measured in convenient units such as milliseconds (ms).