Hi, what do you want to do?
SciShow
How 19th Century Lighthouses Power Advanced Space Drives
The technology we use for space exploration gets more advanced all the time, but some of our most ambitious programs actually rely on optics invented in the 19th century for lighthouses.
Curated Video
History of the lighthouse
Explore the history of lighthouses. Physical processes -Light - Light sources Learning Points Reflectors can be used to concentrate the brightness of light sources. Lenses refract, or bend light and concentrate it into a beam. A Twig...
Curated OER
Greece - Age of Alexander the Great, Part 4/5
After the death of Alexander, Ptolemy I assumes control of Egypt. Combining Greek culture and Greek and Egyptian know-how, PtolemyÕs engineers design and build the first known lighthouse. Computer generated reconstructions present...