Who Discovered The Concept Of Camera?

The Chinese philosopher Mozi born in the year 470 B.C. and died in the year 391 B.C.. he was the first to try to think of passing a light beam on a pinhole, but he did not reach what can that phenomena be used at. The Greek polymath Aristotle whom was born in the year […]
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Who Discovered Radio Waves And Radar?

Radar is a device used to detect objects using radio waves. The radar is used to monitor vehicles, planes, controlled missiles or the weather. The antena of the radar is a dish, which can transmit radio waves that would reflect back when hitting the object. The radar determine the altitude, the direction, the speed and […]
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Who Invented Phones?

In the year 1875, The English electric engineer Willoughby Smith (1828-1891) reached to the photoconductivity of the element selenium. Which led to the first photoelectric cells, as Smith discovered while using selenium in an experiment that the conductivity of the selenium decreases when illumunation is available. In the year 1876, Alexander Graham Bell (1847-1922) succeeded […]
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Who Discovered Pencils?

Most of the pencils are made from graphite with clay, some pencils are made from charcoal, others are made from carbon, and there is also the colored pencils and grease pencils. Most of the mixture are covered with a wooden binder, while some are covered with plastic. The great advantage in the pencil, which caused […]
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Most Famous Explorers

The Portuguese Prince Henry, the son of the king John 1 (1394-1460) was the first to found colonizations for the Portuguese Empire in the Azores in the year 1430. He was the first to try to explore a route around Africa. The Italian navigator, explorer and colonizer Christopher Columbus (1451-1506) made four voyages for the […]
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Who Invented The Compass?

The magnetic compass determine the north, south, east and west directions using a magnet pointer. The north and south directions in the magnetic compass are parallel to the north and south directions of the earth. The magnetic compass was first invented by the ancient Chinese around 2000 years ago, it was used in geomancy and […]
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