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…
The QWERTY keyboard derives its name from the sequence of letters in the first row of the keyboard. It was invented by the American Christopher Latham Sholes in 1868, who had built the first typewriter and included this sequence of letters on the keyboard. The sequence is about 129 years old.
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…
There are usually twelve full moons in a year, usually once a month. This is because of the waxing and waning of the moon. It takes about 29 days for the moon to complete its cycle and return to its starting phase. So in months that have less than 29 days, which is only February,…
