A ship captain noticed rhythmic flashes from a nearby island but no one was signaling. What was causing the lights?
Category: Story · Difficulty: hard
Hint: Think about known maritime navigational aids that produce light patterns.
Answer
Reflections from rotating lighthouse mirrors
Explanation
The lighthouse's rotating mirrors reflected sunlight or lamp light creating rhythmic flashes that appeared without deliberate signaling.
This is a hard story riddle — a tricky one that takes a little thought. The answer is Reflections from rotating lighthouse mirrors.
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