Cross section
Encyclopedia
Cross section may refer to:
- Cross section (geometry)Cross section (geometry)In geometry, a cross-section is the intersection of a figure in 2-dimensional space with a line, or of a body in 3-dimensional space with a plane, etc...
, the intersection of a 3-dimensional body with a plane - Cross-sectional views in architecture & engineering
- Radar cross sectionRadar cross sectionRadar cross section is a measure of how detectable an object is with a radar. A larger RCS indicates that an object is more easily detected.An object reflects a limited amount of radar energy...
, the unit of measure of how detectable an object is with a radar - Cross section (physics)Cross section (physics)A cross section is the effective area which governs the probability of some scattering or absorption event. Together with particle density and path length, it can be used to predict the total scattering probability via the Beer-Lambert law....
, the likelihood of an interaction event between two particles- Absorption cross sectionAbsorption cross sectionAbsorption cross section is a measure for the probability of an absorption process. More generally, the term cross section is used in physics to quantify the probability of a certain particle-particle interaction, e.g., scattering, electromagnetic absorption, etc...
- Neutron cross-sectionNeutron cross-sectionIn nuclear and particle physics, the concept of a neutron cross section is used to express the likelihood of interaction between an incident neutron and a target nucleus. In conjunction with the neutron flux, it enables the calculation of the reaction rate, for example to derive the thermal power...
- Nuclear cross sectionNuclear cross sectionThe nuclear cross section of a nucleus is used to characterize the probability that a nuclear reaction will occur. The concept of a nuclear cross section can be quantified physically in terms of "characteristic area" where a larger area means a larger probability of interaction...
- Photoionisation cross sectionPhotoionisation cross sectionPhotoionisation cross section in the context of condensed matter physics refers to the probability of a particle being emitted from its electronic state.- Cross section in photoemission :...
- Scattering cross section
- Absorption cross section
- Section (fiber bundle)Section (fiber bundle)In the mathematical field of topology, a section of a fiber bundle π is a continuous right inverse of the function π...
, in differential and algebraic geometry and topology, a section of a fiber bundle or sheaf - Cross-sectional dataCross-sectional dataCross-sectional data or cross section in statistics and econometrics is a type of one-dimensional data set. Cross-sectional data refers to data collected by observing many subjects at the same point of time, or without regard to differences in time...
, a type of one-dimensional data set in statistics and econometrics - StratigraphyStratigraphyStratigraphy, a branch of geology, studies rock layers and layering . It is primarily used in the study of sedimentary and layered volcanic rocks....
, the study of geological cross-sections- Core sampleCore sampleA core sample is a cylindrical section of a naturally occurring substance. Most core samples are obtained by drilling with special drills into the substance, for example sediment or rock, with a hollow steel tube called a core drill. The hole made for the core sample is called the "core hole". A...
- Thin sectionThin sectionIn optical mineralogy and petrography, a thin section is a laboratory preparation of a rock, mineral, soil, pottery, bones, or even metal sample for use with a polarizing petrographic microscope, electron microscope and electron microprobe. A thin sliver of rock is cut from the sample with a...
- Core sample
- Cross section (biology), a sample such as that created by a microtomeMicrotomeA microtome is a sectioning instrument that allows for the cutting of extremely thin slices of material, known as sections. Microtomes are an important device in microscopy preparation, allowing for the preparation of samples for observation under transmitted light or electron radiation...