Stuff You Should Know Selects: How Lighthouses Work
Mar 20, 2021
Discover the fascinating world of lighthouses, from their quirky histories to their vital roles in maritime navigation. The hosts share whimsical anecdotes about lighthouse keepers and the evolution of technology from ancient fires to modern electric lights. Explore the architectural marvels like the Pharos of Alexandria and the charming stories behind their construction. Delve into the personal tales of lighthouse keepers, including the heroic contributions of women in the field, all while enjoying lighthearted discussions on cocktails and wordplay.
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Lanterns and the Fresnel Lens
- 18th-century lighthouses transitioned to lanterns, but fuel sources like coal smudged the glass.
- Augustine Fresnel's 1822 invention of the Fresnel lens dramatically improved light projection.
Pharos of Alexandria
- The Pharos of Alexandria, a masonry lighthouse, was one of the Seven Wonders of the Ancient World.
- It withstood time until a massive earthquake brought it down.
Owning a Lighthouse
- Decommissioned lighthouses can be obtained for a nominal fee through the National Historic Lighthouse Preservation Act of 2000.
- New owners must maintain the lighthouse and ensure public access.