Search results
- Dictionaryspectral/ˈspɛktr(ə)l/
adjective
- 1. of or concerning spectra or the spectrum.
Powered by Oxford Dictionaries
21 hours ago · Speciation is a complex process sparked by multitudes of environmental stressors and culminating in adaptive, and perhaps novel, phenotypic traits. A new study presents evidence supporting spectral niche-partitioning in a cyanobacterial clade specializing in far-red photosynthesis.
5 days ago · Light exists on a spectrum, and this guide explains that spectrum, its basis, and the varying ways in which its properties are exploited in the many different spectral bands.
5 days ago · infrared radiation, that portion of the electromagnetic spectrum that extends from the long wavelength, or red, end of the visible-light range to the microwave range. Invisible to the eye, it can be detected as a sensation of warmth on the skin.
- The Editors of Encyclopaedia Britannica
3 days ago · Spectral density estimation is a mathematical technique used to measure the energy contribution of oscillatory signals, such as waves and currents, by identifying which frequencies carry the...
21 hours ago · In addition, stars may be classified by the luminosity effects found in their spectral lines, which correspond to their spatial size and is determined by their surface gravity. These range from 0 ( hypergiants ) through III ( giants ) to V (main sequence dwarfs); some authors add VII (white dwarfs).
2 days ago · The Sun is the star at the center of the Solar System. It is a massive, nearly perfect sphere of hot plasma, heated to incandescence by nuclear fusion reactions in its core, radiating the energy from its surface mainly as visible light and infrared radiation with 10% at ultraviolet energies.
1 day ago · In spectral graph theory, an eigenvalue of a graph is defined as an eigenvalue of the graph's adjacency matrix, or (increasingly) of the graph's Laplacian matrix due to its discrete Laplace operator, which is either (sometimes called the combinatorial Laplacian) or / / (sometimes called the normalized Laplacian), where is a diagonal matrix with equal to the degree of vertex , and in /, the th ...
