The Great Pyramid of Giza is the oldest and the largest pyramid in Egypt. It was built for the Pharaoh Khufu (Cheops in Greek) and took 20 years to complete. The length of each side at the base averages 755.75 feet (230 metres). Its original height was 481.4 feet (147 metres) and present height is…
Badminton is a popular sport played with lightweight racquets and a shuttlecock. It is said to have been originated in Poona, now Pune, where the British army officers picked it up in the 1860s. The sport was called Poona. It was introduced in England in about 1873 at the country estate of the Duke of…
A spherical triangle is formed on the surface of a sphere by three arcs. When the magnitudes of the three angles are added, they have a value that is greater than 180°, which is the value for the sum of three angles of a normal triangle.
‘Triskaidekaphobia’ is a word that arises from the greek tris meaning three, and deka meaning ten, i.e. thirteen, and phobia meaning fear. Triskaidekaphobia thus means the fear of the ‘number thirteen’. In western culture, the number thirteen is often associated with ill luck. Many hotels in the western countries have no thirteenth floor, and many streets are avoided being…
Space and time are woven together to form a fourth dimension called ‘space-time’. The ‘curvature’ is a geometric property of space- time. Einstein identified this property while he was working on his General Relativity theory. The curvature of space-time is directly related to the energy and the momentum of any matter or radiation. A standard…
Orville Wright is considered as the ‘father of modern aviation’. Together with his brother Wilbur, he invented the first airplane. He developed flight technology for the United States Army. Mahatma Gandhi, an international figure symbolizing peace, the Father of the Indian Nation, ushered in the Indian independence through non-violent means. Both Orville Wright and Mahatma Gandhi…
