everything emits light ::: Everything and everyone on this planet is a light emitting source.
All objects emit electromagnetic radiation according to their temperature.
If the Sun were made of bananas, it would be just as hot ::: The Sun is hot, as the more astute of you will have noticed. It is hot because its enormous weight about a billion billion billion tons creates vast gravity, putting its core under colossal pressure. And enormous pressure leads to enormous temperature. Anti-gravity movement ::: Water can easily run against the gravitational pull when moving up narrow pipes. The process is described as Capillary Action. Water moves up in the narrow spaces without any assistance and against the gravitational force. This ability of the liquid proves that gravitational force cant control the movement of every matter present on earth. At times, other forces (Surface tension, in this case) can defeat it. The speed of time. ::: If you traveled at the speed of light, time would stop. According to Einsteins Theory of Special Relativity, the faster you go, the slower time passes for you relative to your surroundings. twin electrons ::: just like how every electron has a twin somewhere else in the universe that are connected to each other and at the same time at any location across the universe, there is another electron that's paired with it when you change the charge of one, the other changes as well boil water without heating ::: Just create some vacuum above the water surface, and it will get boiled, regardless of temperature. It will remain cold during the process. light will not stop for you ::: If you travel with a speed of a moving bus, you will not see the bus moving at all. In your frame of reference, the bus is practically at rest. However, the same thing does not happen when you travel at a speed of light. The light will not stop for you. It will still be travelling at a speed of light in your frame of reference, and you will be able to see' things. dark matter and dark energy ::: The amount of total mass in the universe is vastly greater than the mass we can actually account for. Physicists developed an explanation for this, and the leading theory right now is that dark mattera mysterious substance that emits no lightaccounts for the missing mass. Dark matter and dark energy account for approximately 95% of the mass in the universe. 29. Understanding cosmic expansion. ::: Heres where things get a little trippy. the Big Bang Theory is an important explanation for the origin of our universe. Basically, the universe started as an explosion. Debris (planets, stars, etc) was flung around in all directions, driven by the enormous energy of the blast. Because all of this debris is so heavy, we would expect this explosion to slow down after a while. Heres the catch: it hasnt slowed down at all. In fact, the universe is expanding faster over time. This as crazy as if you threw a baseball that kept getting faster and faster, never falling back to the ground. The prevailing explanation for this is that force exerted by dark matter and energy is propelling cosmic expansion. 28. So many hydrogen atoms. ::: The most abundant atom in the universe is the hydrogen atom. Nearly 74% of the atoms in the Milky Way galaxy are hydrogen atoms. Electrons behave differently when its being observed. ::: Thats right, The mere act of observation can completely change the outcome of an event! In the famous Double Slit Experiment, researches proved that hen a camera observes electrons, they act as particles. However, when the no equipment is used to observe the electrons, they act as waves and particles simultaneously. Theres enormous disagreement and lack of certainty as to why this occurs. The faster you move, the heavier you get. ::: However, this is negligible at human speeds even Usain Bolt is not noticeably heavier when running than when still but once you reach an appreciable fraction of the speed of light, your mass increases rapidly. atomic composition ::: Although atoms are the smallest unit of an element, they consist of even tinier particles called quarks and leptons. An electron is a lepton. Protons and neutrons consist of three quarks each. The Uncertainty Principle, ::: or the Heisenbergs Uncertainty Principle, is one of the most famous and misunderstood ideas in physics. It states that the position and momentum of a particle cannot be simultaneously measured with high precision. In laymans terms, this means that there is a fuzziness in nature, a fundamental limit to what we can know about the behaviour of particles and, therefore, nature. This radical principle caused many physicists to change their goal. Many physicists acknowledge that the goal of modern physics is no longer to understand the nature of the universe entirely, but rather to understand it within the limits of the Uncertainty Principle.
Neutron stars are so dense that a teaspoon of them would be equal to the weight of Earths entire population. 5. Creating singularities. ::: Dying stars create black holes. Like a good old chap, our Sun is going to end its life quietly. When its nuclear fuel burns out, itll slowly fade into a white dwarf. Thats not the case for far more massive stars. Lets say you have a star thats about 20 times more massive than the Sun. When this monster runs out of fuel, gravity violently overwhelms and collapses the core and other layers are flung into space. This is called a supernova. The remaining core collapses into a singularity a spot of infinitely dense mass and almost no volume. Thats another name for a black hole. Einsteins re buttal to the Heisenberg Uncertainty Principle ::: One of Albert Einsteins most famous quotes is, God does not play dice. Few quotes have been so radically misunderstood. Many people have assumed Einstein to be referring to a personal or religious god. He wasnt. The full quote is actually God does not play dice with the universe. This was Einsteins re buttal to the Heisenberg Uncertainty Principle, which Einstein adamantly rejected. He believed there must be some underlying laws of nature that could define particles and make it possible to calculate both their speed and position. Theres no evidence of the law Einstein hoped for, and all experimental evidence suggests that quantum mechanics is real. However, quantum mechanics (the field where the Uncertainty Principle is king) doesnt fit with other widely excepted theories, like Einsteins Special and General Theory of Relativity. Quantum mechanics may be supported by evidence, but it remains a total mystery as to how it fits in with the rest of physics.
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The noun physics has 2 senses (first 1 from tagged texts)
1. (10) physics, natural philosophy ::: (the science of matter and energy and their interactions; "his favorite subject was physics") 2. physics, physical science ::: (the physical properties, phenomena, and laws of something; "he studied the physics of radiation")
--- Overview of noun physic_
The noun physic has 1 sense (no senses from tagged texts)
1. purgative, cathartic, physic, aperient ::: (a purging medicine; stimulates evacuation of the bowels)
--- Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun physics_