Scientific instruments

posted in: Science 0

A scientific instrument is an instrument used in science to acquire data, from nanoscale to macroscopic scales. These are mostly measuring instruments (spectrometer for example) or observation (polarizing microscope for example) or, more and more, both at once. Characterizations An … Read More

Atom

(Representation of a helium-4 atom with, appearing pink in the center, the atomic nucleus and, in gradient of gray all around, the electronic cloud. The helium-4 nucleus, enlarged on the right, is formed of two protons and two neutrons.) An … Read More

Civil disobedience

posted in: Politics 0

(Sebastian Loscher: Allegory of Justice (1536)) Civil disobedience is the public and accepted refusal to submit to a law, regulation, organization or power deemed unfair by those who challenge it, while making this refusal a peaceful weapon of combat. The … Read More

Taxonomies

posted in: Science 0

(Phylogenetic trees have the shape of dendrograms, each node of the dendrogram corresponds to a clade. ) Taxonomy (from the Greek: ταξις, taxis, ordering and νομος, nomos, norm or rule) is, in its most general sense, the discipline of classification. … Read More

Optics

posted in: Light 0

(Optics includes study of dispersion of light. ) Optics is the branch of electromagnetism that describes the behavior and properties of light and its interaction with matter (photometry). The perspective deals with what are called the optical phenomena, on the … Read More

Normative ethics

posted in: News 0

(The tram dilemma is a thought experiment that can serve to illustrate and test different ethical theories.) Normative ethics is the branch of ethics that studies the possible moral criteria to determine when an action is right and when it is not. It looks for general principles that … Read More

Electrostatics

(Lightning causing a flash of light over Oradea in Romania.) Electrostatics is the branch of physics that studies the phenomena created by static electric charges for the observer. The obtained laws can be generalized to variable (quasi-electrostatic) systems provided that … Read More

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