“In summary, there is nothing much to the conversion of energy into matter and vice versa. The first actual transformation of light… — Henning Genz Change 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 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
“Once the thermal radiation reaches the surface temperature of the Sun-some 6000 degrees Celsius-we perceive it as white light. At still higher… — Henning Genz White light 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
“We know there is a conservation law for electric charge; this simply means that the sum of these charges in any process… — Henning Genz Copy Share Image
“Of all conceivable reasons for some sequence of physical events Plato recognizes only its ultimate aim as worthy of attention. The world… — Henning Genz Empty space Copy Share Image
“The freezing of water is called a phase transition. The temperature at which this happens is called a critical temperature. A different… — Henning Genz 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
“SYMMETRY BREAKING The preferential direction fixed by this spontaneous symmetry breaking will now determine which among the elementary particles will share in… — Henning Genz 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
“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
“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
“The field of the electron is real because it results from the laws of quantum mechanics and appropriate initial conditions. The laws… — Henning Genz Empty space 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 Copy Share Image
“Positional, or potential energy, is the energy we add to a rock when we lift it from the floor and put it… — Henning Genz Energy 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 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
“We know that the uncertainty relation implies not only the absence of empty space but also the nature of the minimal content… — Henning Genz Empty space Copy Share Image
“In the general theory, the field is all-pervasive; there is no such thing as space without a field. The space and all… — Henning Genz Copy Share Image
“For all we know, the universe as a whole does not rotate. Now, the reader might ask, with respect to what should… — Henning Genz Books Copy Share Image
“Take an electron at rest. We can liberate its mass energy and transform it into different manifestations of energy by making it… — Henning Genz Change Copy Share Image
“To illustrate this relation, think of a game of table tennis. As the ball hits the table, it will bounce up and… — Henning Genz Bouncing ball Copy Share Image
“Let's return to Archytas's staff and to the expanding Universe. A javelin that is thrown straight upward will drop back down a… — Henning Genz Big bang Copy Share Image
