The word reflection (also spelt reflexion in British English) can refer to several different concepts: In mathematics, reflection is a transformation of a space, a reflection group is a group generated by reflections, and the reflection principle is a theorem of set theory. In physics, reflection is a wave phenomenon. In computer science, reflection is a programming language feature for metaprogramming, in languages or language engines like Java and .NE

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See also:

Reflection physics, Reflection physics - Specular mirror-like reflection, Reflection physics - Other types of reflection, Reflection physics - Diffuse reflection, Reflection physics - Retroreflection, Reflection physics - Neutron reflection, Reflection physics - Quantum Interpretation

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A naive version of the reflection principle states that "for any property of the universe of all sets we can find a set with the same property". This leads to an immediate contradiction: the universe of all sets contains all sets, but there is no set with the property that it contains all sets. To get useful (and non-contradictory) reflection principles we need to be more careful about what we mean by "property" and what properties we allow. To find non-contradictory reflection principles we might argue informally as follows. Suppose ...

See also:

Reflection principle, Reflection principle - Motivation for reflection principles, Reflection principle - The reflection principle as a theorem of ZFC, Reflection principle - Reflection principles as new axioms

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Hindu Quotes: An Object's Reflection

An object has a reflection: When looking we see two images, yet there is only one thing. Likewise, this world is a reflection of the Supreme Lord. We may see two, yet only One exists…

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(See also: Hinduism Archives, Hindu Quotes, Inspirational Quotes, Love Quotes, Friendship Quotes, Life Quotes)

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Muslim Quotes: Reflect on Your Existence

God has power to bring the dead back to life-and he will do so on the day of judgement, when every conscience will be searched. People will stand helpless; no one will be able to support them.

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(See also: Islam Archives, Muslim Quotes, Inspirational Quotes, Love Quotes, Friendship Quotes, Life Quotes)

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Reflections on OLD GUARD PAGANISM

'Old Guard Paganism'. The phrase started out as a joke, but then caught on. This tells us something. It tells us there is a NEED for such a term. It also implies its own antithesis, 'New Guard Paganism'. And it indicates that there is some difference between the two -- a 'difference that makes a difference' -- and thus requires differentiating labels. (It should perhaps be noted that the word 'Paganism' is used in the present context -- however inaccurately -- to refer to modern Neo-Pagan Witchcraft, or Wicca. With grave misgivings, I have adopted this usage here.)

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When I was growing up, I thought that "spirituality" was the same thing as "religion," which was something for which I had little respect. My early experiences with organized religion left me convinced that the church was a body of contradictions, from which you would never get a rational, straight answer. I was quite mystified that so many people would go to church every Sunday to engage in something that seemed so irrelevant.

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We tend to pray to God only for our worldly needs, which are much more than our requirements. Krishna says in the Gita, "Four types of devotees worship me: the distressed ones, those seeking knowledge, those seeking wealth and others seeking wisdom. Of all such devotees, the one who seeks wisdom is dearest to me".

Shrishti or creation means projection and expansion coming out of One. That is the evolution of the world. Krishna also says that at the end of a Kalpa, the whole universe - all the souls, whether in the state of birth and death or in moksha, including Brahma - will dissolve within Me.

(See also: Amarnath, Indian Festivals, Spiritual Guidance, God and Religion, Peace on Earth, Peace of Mind, Love and Happiness, Life and Beyond, Body Mind and Soul)

Anti-reflective or antireflection (AR) coatings are a type of optical coating applied to lenses and other devices to reduce reflection from optical surfaces. This often improves the efficiency of the system; this is especially important if the light wasted by reflections is difficult to obtain, i.e. from a large telescope, an obstacle on a dark roadway, or an intricate optics experiment. They also have qualitative benefits like making the eyes of a glasses-wea ...

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Reflection symmetry, mirror symmetry, mirror-image symmetry, or bilateral symmetry is symmetry with respect to reflection. It is the most common type of symmetry. In 2D there is an axis of symmetry, in 3D a plane of symmetry. An object or figure for which this applies is equal to its mirror image. The axis of symmetry of a two-dimensional figure is a line such that, if a perpendicular is constructed, any two points lying on the perpendicular at equal distances from the axis of symmetry are ide ...

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Variegation is the appearance of differently coloured zones in the leaves, and sometimes the stems, of plants. This may be due to a number of causes. Some variegation is attractive and ornamental, and gardeners tend to preserve these. The term is also sometimes used to refer to colour zonation in flowers. Variegation - Chimeral variegation. Plants bearing such variegation are chimeras, with more than one type of genetic makeup in their tissues. A lack of chlorophyll producing tissue in some tissues c ...

Including:

• Variegation - Chimeral variegation
• Variegation - Variegation due to reflective effects
• Variegation - Variegation caused by other pigments
• Variegation - Pathological variegation

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In telecommunication, the term reflection coefficient (RC) has the following meanings: 1. The ratio of the amplitude of the reflected wave to the amplitude of the incident wave. 2. At a discontinuity in a transmission line, the complex ratio of the electric field strength of the reflected wave to that of the incident wave. This is typically represented with a Γ (capital gamma). Note 1: The reflection coefficient may a ...

See also:

Reflection coefficient, Reflection coefficient - Telcommunication, Reflection coefficient - Seismology, Reflection coefficient - Optics

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Reflection seismology is extensively used in exploration for hydrocarbons (i.e., petroleum , natural gas) and other resources as coal, ores and minerals, geothermal. Reflection seismology is also used for basic research into the nature and origin of the rocks making up the Earth's crust. Reflection Seismology is also used in shallow application for engineering, groundwater and environmental surveying. A method similar to reflection seismology which uses electromagnetic instead of elastic waves is known as ground penetrating radar or GPR. GPR is widely used for ...

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Reflection seismology, Reflection seismology - Applications, Reflection seismology - Hydrocarbon exploration, Reflection seismology - Crustal studies, Reflection seismology - Outline of the method, Reflection seismology - Reflection experiments, Reflection seismology - Interpretation of reflections, Reflection seismology - Reflection and transmission, Reflection seismology - Environmental impact, Reflection seismology - History

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Reflecting telescope - Newtonian focus. The Newtonian usually has a paraboloid primary mirror but for small apertures, say 12cm or less, if the focal ratio is f/8 or longer a spherical primary mirror is sufficient for high visual resolution. A flat secondary mirror reflects the light to a focal plane at the side of the top of the telescope tube. It is one of the simplest and least expensive designs for a given size of primary, and is popular with amateurs as a home-build project. Since the light path is un ...

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Reflecting telescope, Reflecting telescope - Technical considerations, Reflecting telescope - Reflecting telescope designs, Reflecting telescope - Newtonian focus, Reflecting telescope - Cassegrain focus, Reflecting telescope - Schmidt camera, Reflecting telescope - Focal planes, Reflecting telescope - Prime focus, Reflecting telescope - Coudé focus

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Reflections of waves generated by earthquakes have been observed on seismograms since the beginning of modern seismology. Seismologists have been able to develop familiar models of the Earth's interior in part by observing these reflections from major boundaries deep within the earth. However, the history of the use of human-generated seismic waves to map in detail the geology of the Earth's crust is largely tied to commercial ...

See also:

Reflection seismology, Reflection seismology - Applications, Reflection seismology - Hydrocarbon exploration, Reflection seismology - Crustal studies, Reflection seismology - Outline of the method, Reflection seismology - Reflection experiments, Reflection seismology - Interpretation of reflections, Reflection seismology - Reflection and transmission, Reflection seismology - Environmental impact, Reflection seismology - History

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Reflecting telescope - Schmidt camera. The Schmidt camera, invented by Bernhard Schmidt, is not technically a telescope since the light path does not exit to an eyepiece. Therefore it is strictly a camera, with a photographic plate, film or a CCD placed at the prime focus. The Schmidt camera corrects for spherical aberration by placing a correcting lens at the center of curvature of the mirror. The corrector, which is thicker in the middle and the edges, corrects the light paths so that the outer and inner parts ...

See also:

Reflecting telescope, Reflecting telescope - Technical considerations, Reflecting telescope - Reflecting telescope designs, Reflecting telescope - Schmidt camera, Reflecting telescope - Newtonian focus, Reflecting telescope - Cassegrain focus, Reflecting telescope - Focal planes, Reflecting telescope - Prime focus, Reflecting telescope - Coudé focus

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Reflection band - Current members. Markus Radola - Vocals Timo Lehmann - Guitar Heino Drescher - Guitar Siggi Kwapich - Bass Kev Siepmann - Drums Reflection band - Former members. Stephan Baeumer - Drums ...

See also:

Reflection band, Reflection band - Members, Reflection band - Current members, Reflection band - Former members, Reflection band - Discography

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A mirror provides the most common model for specular light reflection and consists of a glass sheet in front of a metallic coating where the reflection actually occurs. It is also possible for reflection to occur from the surface of transparent media, such as water or glass. In the diagram, a light ray PO strikes a vertical mirror at point O, and the reflected ray is OQ. By projecting an imaginary line through point O perpendicular to the mirror, known as the normal, we can measure the angle of in ...

See also:

Reflection physics, Reflection physics - Specular mirror-like reflection, Reflection physics - Other types of reflection, Reflection physics - Diffuse reflection, Reflection physics - Retroreflection, Reflection physics - Neutron reflection, Reflection physics - Quantum Interpretation

Read more here: » Reflection physics: Encyclopedia II - Reflection physics - Specular mirror-like reflection

In trying to fomalize the argument for the reflection principle of the previous section in ZF set theory, it turns out to be necessary to add some conditions about the collection of properties A (for example, A might be finite). Doing this produces several closely related "reflection theorems" of ZFC all of which state that we can find a set that is almost a model of ZFC. One form of the reflection principle in ZFC says that for any finite set of axioms of ZFC we can find a countable transitive model satisfying th ...

See also:

Reflection principle, Reflection principle - Motivation for reflection principles, Reflection principle - The reflection principle as a theorem of ZFC, Reflection principle - Reflection principles as new axioms

Read more here: » Reflection principle: Encyclopedia II - Reflection principle - The reflection principle as a theorem of ZFC

All interactions between light photons and matter are described as a series of absorption and emission of photons. If one examines a single molecule at the surface of a material, an arriving photon will be absorbed and almost immediately reemitted. The ‘new’ photon may be emitted in any direction, thus causing diffuse reflection. The specular reflection (following Hero's equi-angular reflection law) is a quantum mechanical effect explained as the sum of the most likely paths the photons will have taken. Light-matter interaction is ...

See also:

Reflection physics, Reflection physics - Specular mirror-like reflection, Reflection physics - Other types of reflection, Reflection physics - Diffuse reflection, Reflection physics - Retroreflection, Reflection physics - Neutron reflection, Reflection physics - Quantum Interpretation

Read more here: » Reflection physics: Encyclopedia II - Reflection physics - Quantum Interpretation