A coherence device is any discourse feature that helps the reader gain better understanding of a text. For example, the manipulation of Information Flow can create coherence, if the text presents its information in a way that will assist the reader in understanding the purpose of the text, ie, end-focus.
coherence in sentance
The coherence of the party made me in confusion as whom to vote. This is an example of coherence in a sentence.
The word coherence is a noun.
It is the phase, which can be measuerd with these type of coherence.
A connective device is a word or phrase used to link different parts of a text together, such as "however," "therefore," "in addition," etc. These devices help maintain coherence in writing and improve the flow of ideas for the reader.
The size in at least one of the spatial dimensions should be in between the size of an individual atom (~0.1nm) and the electronic coherence length, ie. the maximum distance at which it makes sense to describe an electron with a single wavefunction. The coherence lenght is limited by inelastic processes, it depends strongly on the material, temperature, magnetic field, or even geometry of the device. In semiconductors at sub-Kelvin temperatures it can be of order of microns.
coherence
Yes, coherence is important in both reflection and refraction. In reflection, coherence ensures that the wavefronts remain in phase after reflection. In refraction, coherence helps to maintain the continuity of the wavefronts as the light passes through different mediums.
Coherence refers to the quality of being logical, consistent, and making sense. In writing or speaking, coherence ensures that ideas are clear and connected in a way that is easy to follow and understand.
The government wants territorial coherence and internal stability along with political coherence. And if the people lack this the state may use deadly force to defend itself which often leads to genocide.
Fiber optic lasers can have coherence lengths greater than 100 km. Helium-neon lasers can produce light with coherence lengths greater than 5 m but 20 cm is typical. Laser diode chips are a fraction of a mm on a side and so coherence lengths on that order are expected, however some of the cheapest laser pointers can produce coherence lengths of 20 cm for short intervals of time and have been used to create holograms. In general the length depends on many variables. The typical red light laser diode (λ= 650 nm) with a frequency stabilizer can have a coherence length of over 1 m. LEDs have a spectra width Δλ of about 50 nm, and may have a coherence length of 10's to 100's of μms. As a side note, because the exited states of the atoms in a tungsten filament are short lived, the coherence length is only a few micrometers (μm). Some notes about coherence lengths: Interference is only visible if the coherence length of the light is at least as long as the path-length difference that creates the interference. Spectral width in optics is related to coherence length by the formula L = λ²/(nΔλ) where λ is the central wavelength, n is the index of refraction and Δλ is the spectral width. The coherence time is the above coherence length divided by the light's phase velocity in the medium or.. τ = λ²/(cΔλ) Refer to the Related link below for Wikipedia's article on coherence length
The coherence bandwidth of a wireless channel is the range of frequencies that are allowed to pass through the channel without distortion.