History of the lighthouse

The video explores the evolution of lighthouses from ancient times to modern day. Initially, fires were used to guide ships, but their limited visibility led to the creation of lighthouses, starting with the Lighthouse of Alexandria. Over time, technological advancements like the Fresnel lens significantly improved lighthouse efficiency, allowing them to be seen from greater distances. In the 19th century, lighthouses adopted electric lights and rotating lenses, enhancing their visibility and effectiveness.

What was the primary purpose of the Lighthouse of Alexandria?

• To act as a watchtower for invaders

• To serve as a royal palace

• To store ancient manuscripts

• To guide ships safely to shore

How did the Fresnel lens improve lighthouse lighting?

• By using water to magnify the light

• By using colored glass to enhance visibility

• By being lighter and cheaper while focusing light effectively

• By incorporating solar panels for energy

Who invented the first modern lighthouse lens?

• Thomas Edison

• Isaac Newton

• Leonardo da Vinci

• Augustin Fresnel

What was a significant change in lighthouse technology during the 19th century?

• The addition of sound signals

• The use of wooden structures

• The switch to electric lighting

• The introduction of solar-powered lights

What is the purpose of rotating lenses in modern lighthouses?

• To create a continuous beam of light

• To reduce energy consumption

• To make the light appear to flash on and off

• To change the color of the light