“Charged particles can scatter light by absorbing and reemitting it (a). Light can scatter off light only by the mediation of charged… — Henning Genz Light Copy Share Image
“At the end of inflation, just as after the hot Big Bang, the universe is hot. It is, we might say, self-created… — Henning Genz Big bang Copy Share Image
“If the universe as we know it is nothing but a vacuum fluctuation with a purloined total energy that is not much… — Henning Genz Fluctuation Copy Share Image
“Can a cat vanish, but not its grin? Can structure exist without matter? This may be possible in the abstract interpretation of… — Henning Genz Copy Share Image
“It is impossible to bring a substance down to a temperature of absolute zero; there cannot be a blackbody without radiation because… — Henning Genz Empty space Copy Share Image
“The universe is but one immense unit; it cannot be separated into spatial domains that are totally empty and others that are… — Henning Genz Matter Copy Share Image
“To date, we don't know of any object that cannot, for certain, be subdivided. The chemist's atom consists of nucleus and electrons;… — Henning Genz Theory Copy Share Image
“To date we know only two real media that offer almost no resistance to moving bodies. One such medium was discovered in… — Henning Genz Theory Copy Share Image
“In the process, we might remember that the ground state, the vacuum state of our world, doesn't display all the symmetries of… — Henning Genz Nature Copy Share Image
“When we cause two of one kind of particle- say, an electron and a positron-to collide, the final products might be totally… — Henning Genz Copy Share Image
“The one thing we know is that planet Earth does keep moving in the direction of the constellation Leo at a rate… — Henning Genz Milky way Copy Share Image
“If there weren't any charges, there would be neither absorption nor emission nor any scattering. Light would not impact on the matter… — Henning Genz Goals Copy Share Image
“Chaotic or disordered distributions are symmetrical on the average. An observer cannot conclude anything about his location from looking around him. An… — Henning Genz Chaos Copy Share Image
“As long as two fields that describe one and the same space are identified, the field and the space can be used… — Henning Genz Empty space Copy Share Image
“By reversing the steps that we took to advance from the concept of substance to that of Materia Prima, we can imagine… — Henning Genz Empty space Copy Share Image
“INTO AND OUT OF THE VACUUM To make real particles out of the virtual ones that are part of the vacuum fluctuations,… — Henning Genz Quantum mechanics Copy Share Image
“This question about the reason we do not observe any quantum mechanical uncertainty in the appearance of flies or stars was never… — Henning Genz Quantum mechanics Copy Share Image
“Recall our discussion of the pendulum. Its position at a given instant does not fix its subsequent behavior. Suppose a photograph shows… — Henning Genz Habits Copy Share Image
“SYMMETRY BREAKING The preferential direction fixed by this spontaneous symmetry breaking will now determine which among the elementary particles will share in… — Henning Genz Theory Copy Share Image
“Insofar as the general theory of relativity follows Mach's ideas, it can be seen as expressing the distribution of masses in terms… — Henning Genz Blank canvas Copy Share Image
“What is important here is that for every given curvature there are precisely fixed masses. And since we recall that the virtual… — Henning Genz Space Copy Share Image
“The energy of the vacuumin the universe presents us with a dilemma: We know, on the one hand, that this energy must… — Henning Genz Energy Copy Share Image
“Among Plato's successors, the most remarkable thinker to pick up this strain of argument is Plotinus. He offers little to those who… — Henning Genz Fitness Copy Share Image
“REALITY OF ZERO-POINT ENERGY The uncertainty relation implies that there cannot be a region in space totally devoid of electromagnetic fields. They… — Henning Genz Magnetic fields Copy Share Image
“John Maddox, the editor of the British journal Nature, had immediately suggested that the minister should be told that the Higgs boson… — Henning Genz Empty space Copy Share Image
“We can now infer that at this initial cooldown of the universe across the critical temperature of 10^15 degrees, a mini planetary… — Henning Genz Empty space Copy Share Image
“Second, what properties distinguish an otherwise empty volume that retains only some black-body radiation at zero temperature-dubbed zero-degree radiation-from truly empty space?… — Henning Genz Empty space Copy Share Image
“This elementary process is symbolically illustrated in figure 59c: A photon becomes an electron-positron pair; inversely, an electron and a positron can… — Henning Genz Theory Copy Share Image
“Galaxies, quasars among them, are interpreted by astrophysicists in terms of probes that are attached to points in space and that move… — Henning Genz Big bang Copy Share Image
“The same energy density that we reach today in electron-positron collisions pervaded the entire universe one ten-billionth of a second after the… — Henning Genz Big bang Copy Share Image
“Theory and experiment both show us that light does not need a material medium for propagation. We would have no trouble understanding… — Henning Genz Empty space Copy Share Image
“The laws of quantum mechanics don't permit the removal of arbitrary amounts of energy from a system consisting of two mutually attractive… — Henning Genz Quantum mechanics Copy Share Image
“In order to show that not even light can escape from the gravitational pull of a black hole, we have to hone… — Henning Genz Black hole Copy Share Image
“We know there is a conservation law for electric charge; this simply means that the sum of these charges in any process… — Henning Genz Theory Copy Share Image
“At first glance, it may appear odd that the black hole loses mass upon absorbing another mass-that of the electron. Actually, this… — Henning Genz Black hole Copy Share Image
“LIGHT AS AN EXCITATION OF SPACE Let's try and understand light in terms of an excitation of empty space-even if that makes… — Henning Genz Empty space Copy Share Image
“It is not only the theory of inflation that tells us we don't know all of the masses in the universe. In… — Henning Genz Long ago Copy Share Image
“We have good reason to believe that space and time begin to merge into quantum mechanical uncertainty at distances this small; they… — Henning Genz Black hole Copy Share Image
“To sum up: Electron and positron annihilate as a pair, in a particle-antiparticle collision. Their energy heats up the vacuum; when the… — Henning Genz Theory Copy Share Image
“We associate two different terms with this phenomenon: asymptotic freedom and infrared slavery. At one end of the scale, the short distances,… — Henning Genz Building blocks Copy Share Image
