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What is a lighthouse beam?
TechnologyMaritime
Quick Answer
A lighthouse beam is the directed light sent out by a lighthouse to guide ships. Its rotating pattern and flash interval help sailors identify the coast safely.
The Full Story
The beam from a lighthouse is produced by a lamp and shaped by lenses or reflectors so it can travel far over the sea. Traditional Fresnel lenses, introduced in the 1820s, allowed a much brighter and more focused beam than earlier systems. Each lighthouse has a distinctive flash pattern, known as its character, which mariners use as a navigational aid. Modern lights may use LEDs and automated controls, but the basic purpose remains the same.
Key Facts
1.Fresnel lenses date to the 1820s
2.Flash patterns identify specific lighthouses
3.Modern systems may use LEDs
YouTube Angle
Suggested video title for this topic:
"How a lighthouse tells ships where they are"