Historia del faro

The video explores the evolution of lighthouses from ancient bonfires to modern electric systems. Initially, bonfires were used to guide ships, but their limited visibility led to the development of lighthouses. The ancient Egyptians pioneered the use of lighthouses with mirrors to enhance visibility. The Fresnel lens, invented in 1822, revolutionized lighthouse technology by focusing light more efficiently, making it visible over greater distances. In the 19th century, lighthouses transitioned to electric lights, and modern systems now use rotating lenses to improve visibility.

What was the primary purpose of bonfires on the coast in ancient times?

• To cook food for sailors

• To keep wild animals away

• To signal the start of a festival

• To guide ships safely

Who is credited with inventing the first modern lens for lighthouses?

• Isaac Newton

• Augustine Fresnel

• Galileo Galilei

• Thomas Edison

What was the main advantage of the Fresnel lens over traditional lenses?

• It was lighter and cheaper

• It was more colorful

• It was made of metal

• It was easier to clean

How did the introduction of electric lights impact lighthouses in the 19th century?

• It reduced their visibility

• It made them less reliable

• It enhanced their brightness

• It made them obsolete

What is the purpose of the rotating lens system in modern lighthouses?

• To increase the height of the lighthouse

• To reduce the power consumption

• To make the light appear to flicker

• To change the color of the light