How do old lighthouses work?

Answer 1

Lighthouses use beams of light projected through a special lens called a Fresnel lens. Invented by a Frenchman in the early 1800s, the Fresnel lens concentrates beams of light through a prismatic lens which captures and concentrates them, so the light can be seen for many kilometres out at sea. The lens design uses a system of concentric glass rings to concentrate the light. This design is still used today in car headlights and traffic lights. Modern lighthouses have a system of rotating lenses, and newer lighthouses conserve energy by flashing the light on and off.

Answer 2

people say that ps3 are so easy to work. so light houses haft nothing to do with ps3 but light house work on electrycity. and 2 big lit balss

^ Ignore that

Old lighthouses typically sat an oil lamp down in front of a big lens. This lens would greatly amplify the range of the light, and shine it out over the ocean.

Answer 3

Improve

Lighthouses use beams of light projected through a special lens called a Fresnel lens. Invented by a Frenchman in the early 1800s, the Fresnel lens concentrates beams of light through a prismatic lens which captures and concentrates them, so the light can be seen for many kilometres out at sea. The lens design uses a system of concentric glass rings to concentrate the light. This design is still used today in car headlights and traffic lights.

Modern lighthouses have a system of rotating lenses, and newer lighthouses conserve energy by flashing the light on and off.

Answer 4

A lighthouse beam is created by a huge powerful electric lamp which sends a flash of light out to sea every 15 sec's

Answer 5

it needs a lot of wood and thingys to built a light house

Answer 6

it has a giant light bulb that spins around

Answer 7

with a light