Term
|
Definition
| Abbreviated Å. A unit of length equal to 10-8 cm (one-hundredth of a millionth of a centimeter). on the order of the size of an atom. |
|
|
Term
|
Definition
| A unit of angular measure in which there are 360 arc degrees in a full circle. |
|
|
Term
|
Definition
| A point-like particle with a negative charge; member of the lepton group and thus not divisible into more fundamental particles. |
|
|
Term
|
Definition
| A machine that serves as a source for a well-defined beam of high speed particles for studies in nuclear science and high energy (or particle) physics. |
|
|
Term
|
Definition
| metal that when cooled below a critical temperature has a total disappearance of electrical resistance. Twenty-five elements and many alloys and compounds have been found to be superconducting. The critical temperatures range from .002 k to 18K |
|
|
Term
|
Definition
| A unit of angular measure in which there are 60 arc seconds in 1 arc minute and therefore 3600 arc seconds in 1 arc degree;equal to about 725 km on the Sun |
|
|
Term
|
Definition
| the temperature of −273.16°C (−459.69°F), the hypothetical point at which all molecular activity ceases. |
|
|
Term
|
Definition
The explosion and rapid explansion of matter that occurred at the creation of our universe. IN the immediate aftermath, all matter is thought to have consisted of free quarks and gluons at extremely high temperatures and densities. This plasma then cooled and coalesced into the particles and atoms that now make up all objects in the universe.
The explosion and rapid explansion of matter that occurred at the creation of our universe. In the immediate aftermath,all matter is thought to have consisted of free quarks and gluons at extremely high temperatures and densities. This plasma then cooled and coalesced into the particles and atoms that now make up all objects in the universe. |
|
|
Term
|
Definition
| The amount of energy given to an electron when passing from the negative end to the positive end of a one-volt battery. |
|
|
Term
|
Definition
| Particle with the same mass but opposite charge (and some other properties) as another particle under normal earth conditions. |
|
|
Term
|
Definition
| A region of space that has so much mass concentrated in it that there is no way for a nearby object to escape its gravitational pull. |
|
|
Term
|
Definition
| Radiation that is emitted when a free electron is deflected by an ion, but the free electron is not captured by the ion. Generally, it is a type of radiation emitted when high energy electrons are accelerated. (German for braking radiation) |
|
|
Term
|
Definition
| Centimeter-Gram-Second (abbreviated cm-gm-sec or cm-g-s). The system of measurement that uses these units for distance, mass, and time |
|
|
Term
|
Definition
| The basic structural unit of each of the elements in the Periodic Table. Atoms are composed of protons, neutrons and electrons. |
|
|
Term
|
Definition
| The basic characteristic that differentiates the six varieties of quark. |
|
|
Term
|
Definition
| The physical upwelling of hot matter, thus transporting energy from a lower, hotter region to a higher, cooler region. A bubble of gas that is hotter than its surroundings expands and rises. When it has cooled by passing on its extra heat to its surroundings, the bubble sinks again. It can occur when there is a substantial decrease in temperature with height, such as in the Sun's convection zone. |
|
|
Term
|
Definition
| The outermost layer of the solar atmosphere. The corona consists of a highly rarefied gas with a low density and a temperature greater than one million degrees Kelvin. It is visible to the naked eye during a solar eclipse. |
|
|
Term
|
Definition
| The layer of the solar atmosphere that is located above the photosphere and beneath the transition region and the corona. It is is hotter than the photosphere but not as hot as the corona. |
|
|
Term
|
Definition
| A type physics research machine that brings moving particles into collision with one another for the purpose of studying the outcome. As opposed to a fixed-target machine, which smashes moving particles into a stationary object. |
|
|
Term
|
Definition
| A map showing the intensity of radiation as a function of position. Each contour line corresponds to a specific intensity of radiation, with inner contours corresponding to higher intensities than outer contours. Therefore, a closed contour encircles a region where the intensity of the emitted radiation is greater than or equal to the intensity on the contour line. The contours outline the shape of the emitting source. |
|
|
Term
|
Definition
| A layer in a star in which convection currents are the main mechanism by which energy is transported outward. In the sun, it extends from just below the photosphere to about seventy percent of the solar radius. |
|
|
