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The Dangerous Ratio

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The Dangerous Ratio  It's a stormy day on the sea off the coast of Greece. The date is around 520 BC. Fighting for his life, a man is heaved over the side of a boat and dropped into the open water to die. His name is Hippasus of Metapontum. His crime? Telling the world a mathematical secret. The secret of the dangerous ratio. The murder of Hippasus is a matter of legend, but the secret was real, and certainly dangerous enough to the beliefs of those who knew about it. It was a secret owned by the school of Pythagoras. These early Greek mathematicians (Pythagoras himself was born around 569 BC ) were obsessed with the significance of whole numbers and their ratios. The Pythagorean's motto, carved above the entrance of the school, was " All is number". The inner circle of the school, the mathematikoi, believed that the universe was built around the whole numbers. Each number from one to ten was given a very special significance. Odd numbers were thought to...
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Einstein & Gravitational Waves.....The Genius

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What is a gravitational wave? A  gravitational wave  is an invisible (yet incredibly fast) ripple in space. We’ve known about gravitational waves for a long time. More than 100 years ago, a great scientist named Albert Einstein came up with many ideas about  gravity  and space. Albert Einstein, official 1921 Nobel Prize in Physics photograph. Einstein predicted that something special happens when two bodies—such as planets or stars—orbit each other. He believed that this kind of movement could cause ripples in space. These ripples would spread out like the ripples in a pond when a stone is tossed in. Scientists call these ripples of space  gravitational waves . Gravitational waves are invisible. However, they are incredibly fast. They travel at the speed of light (186,000 miles per second). Gravitational waves squeeze and stretch anything in their path as they pass by. What causes gravitational waves? The...
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Why moon doesn't fall due to Gravity???

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What a great question? Gravity ——- What is gravity? It is an interaction between objects that have the property we call "mass". Then what is mass? How about this definition (that is technically wrong but still useful): mass is the number of electrons, protons, and neutrons that make up an object. With the mass, the gravitational interaction is a force with the following properties: It depends on the mass of both of the objects involved in the interaction. The greater the mass (for either object), the greater the gravitational force. If you increase the distance between the two objects, the gravitational force decreases. The gravitational force on one object in the interaction always is in the direction of the other object. In other words, the gravitational force is an attractive force. There are lots of other cool things about gravity, but this will be enough to get us started. Forces —— So I have a force on the moon. What do forces do to an objec...
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