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- Dictionaryactual/ˈak(t)ʃʊəl/
adjective
- 1. existing in fact; real: "the estimate was much less than the actual cost"
- 2. existing now; current: "using actual income to measure expected income"
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23 hours ago · Holography. Holography is a technique that enables a wavefront to be recorded and later reconstructed. It is best known as a method of generating three-dimensional images, and has a wide range of other uses, including data storage, microscopy, and interferometry. In principle, it is possible to make a hologram for any type of wave .
23 hours ago · A quark (/ k w ɔːr k, k w ɑːr k /) is a type of elementary particle and a fundamental constituent of matter.Quarks combine to form composite particles called hadrons, the most stable of which are protons and neutrons, the components of atomic nuclei. All commonly observable matter is composed of up quarks, down quarks and electrons.Owing to a phenomenon known as color confinement, quarks ...