These are organized by a classification scheme developed exclusively for Cosma. More…
Scientific laws are statements that describe or predict a range of natural phenomena. Each scientific law is a statement based on repeated experimental observations that describes some aspect of the Universe. The term law has diverse usage in many cases (approximate, accurate, broad, or narrow theories) across all fields of natural science (physics, chemistry, biology, geology, astronomy, etc.). Scientific laws summarize and explain a large collection of facts determined by experiment, and are tested based on their ability to predict the results of future experiments. They are developed either from facts or through mathematics, and are strongly supported by empirical evidence. It is generally understood that they reflect causal relationships fundamental to reality, and are discovered rather than invented.
Laws reflect scientific knowledge that experiments have repeatedly verified (and never falsified). Their accuracy does not change when new theories are worked out, but rather the scope of application, since the equation (if any) representing the law does not change. As with other scientific knowledge, they do not have absolute certainty (as mathematical theorems or identities do), and it is always possible for a law to be overturned by future observations. A law can usually be formulated as one or several statements or equations, so that it can be used to predict the outcome of an experiment, given the circumstances of the processes taking place.
Laws differ from hypotheses and postulates, which are proposed during the scientific process before and during validation by experiment and observation. Hypotheses and postulates are not laws since they have not been verified to the same degree and may not be sufficiently general, although they may lead to the formulation of laws. A law is a more solidified and formal statement, distilled from repeated experiment. Laws are narrower in scope than scientific theories, which may contain one or several laws. Science distinguishes a law or theory from facts. Calling a law a fact is ambiguous, an overstatement, or an equivocation. Although the nature of a scientific law is a question in philosophy and although scientific laws describe nature mathematically, scientific laws are practical conclusions reached by the scientific method; they are intended to be neither laden with ontological commitments nor statements of logical absolutes.
According to the unity of science thesis, all scientific laws follow fundamentally from physics. Laws which occur in other sciences ultimately follow from physical laws. Often, from mathematically fundamental viewpoints, universal constants emerge from a scientific law. — Wikipedia
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What do ants and light rays have in common when...
on May 27, 2020 at 3:28 pm
Light and foraging ants seem totally unrelated, but they have one thing in common: They travel along time-reducing paths. According to Fermat's principle about the refraction of a ray of light, the light bends when it meets matter with different refractive indices and travels through time-minimizing paths. Recently, similar behavior was reported in foraging ants in a lab setting: Ants bend their travel paths when they enter a substrate that slows them down. But would the ants behave similarly […]
Poor and black 'invisible cyclists' need to be...
on May 27, 2020 at 3:18 pm
As states and workplaces prepare to open up after the lockdown, many people are looking for alternatives to public transit to get to work.
A special elemental magic
on May 27, 2020 at 3:15 pm
A staple in every science classroom is the periodic table of elements, and for many it is their first introduction to the vast mysteries of the natural world.
Physicists measure a short-lived radioactive...
on May 27, 2020 at 3:00 pm
Researchers at MIT and elsewhere have combined the power of a super collider with techniques of laser spectroscopy to precisely measure a short-lived radioactive molecule, radium monofluoride, for the first time.
A new scheme for satellite-based quantum-secure...
on May 27, 2020 at 1:30 pm
Researchers at the University of Science and Technology of China have recently introduced a new satellite-based quantum-secure time transfer (QSTT) protocol that could enable more secure communications between different satellites or other technology in space. Their protocol, presented in a paper published in Nature Physics, is based on two-way quantum key distribution in free space, a technique to encrypt communications between different devices.