this post was submitted on 20 Aug 2024
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[–] 56_@lemmy.ml 18 points 2 months ago (1 children)

Inside the fresnel lens of a lighthouse. (The tallest land-based lighthouse in the UK)

Perspective from inside a 16 sided fresnel lense, with 2 light bulbs visible

Perspective from outside showing the wavy shape of the glass

[–] Hagdos@lemmy.world 2 points 2 months ago (1 children)

Cool!

Are their taller lighthouses that are not land-based? Are they floating?

[–] 56_@lemmy.ml 2 points 2 months ago

Well... I've tried to find out just now. Most taller lighthouses are on small rocks in the sea. On some the lighthouse covers the entire rock. I have also discovered that there are potentially taller land-based lighthouses in the uk, this one just seems to be best at advertising it.