Who discovered the quantum theory of light? What is the first law of quantum physics? What did Einstein say about quantum physics? How were electromagnetic waves discovered? What is quantum wave theory? What is quantum technology? How do quantum physicists build new beliefs? Why is classical phy...
Who discovered the alpha particle? Who discovered the electromagnetic force? Who discovered the magnetic fields of electric currents? What is the quantum theory of an atom? Who discovered laws of motion, light, and gravity? Who invented the quantum cascade laser?
The concept of an object from which light could not escape (e.g., black hole) was originally proposed by Pierre Simon Laplace in 1795. Using Newton's Theory of Gravity, Laplace calculated that if an object were compressed into a small enough radius, then the escape velocity of that object...
Also, MOND can't account for evidence of dark matter discovered by other techniques that don't involve Newton's second law, such as X-ray astronomy and gravitational lenses. A 2004 revision to MOND, known as TeVeS (Tensor-Vector-Scalar gravity), introduces three different fields into space-...
That's why we need to look at Einstein's later theory, theGeneral Theory of Relativity, which describes how gravity affects the shape of space and flow of time. Imagine a stretched-out sheet. If you place a bowling ball in the middle of the sheet, the sheet will warp as the weight ...
(Newton’s first law). We know that these two triangles have the same area. However, it turns out that the planet moves inward a little bit, due to gravity, and forming the yellow triangle. Kepler told us that the yellow triangle has the same area as the purple one, and thus has ...
The ability of a gyroscope to "defy gravity" is baffling! How can it do that? This mysterious effect is precession. In general, precession works like this: If you have a spinning gyroscope and try to change the orientation of its spin axis, the device will respond by changing its orient...
The reason is simply that gravity bonds us to the planet with enough force to stop us whizzing off into space. But gravity isn't enough to keep us permanently in place. If we supply bigger forces, for example by using our muscles to move our legs and jump in the air, we can "un...
绿洲是如何形成的 How Does An Oasis Form 在埃及西北部距离利比亚边境仅数十公里的大漠深处，有一个被称为“世外桃源”的地方——“锡瓦绿洲”。上百万棵椰枣树，大片大片翠绿的橄榄林，数千口清澈透明的泉水池，包括一代艳后克里奥佩特拉沐浴的泉池，以及一代枭雄亚历山大的神庙、堪称“埃及死海”的盐水湖……这...
How old was Isaac Newton when he discovered gravity? What is Isaac Newton famous for discovering? How did Isaac Newton contribute to the atomic theory? What did Isaac Newton discover in the Scientific Revolution? What made Isaac Newton great?