quantum world is seen through classical glasses

An example of metaphor in discourse about science:

"In brief, the only way to look at the quantum world is through classical glasses."

Landsman, Klaas (2017) Bohrification. From classical concepts to commutative operator algebras, in, Neils Bohr and the Philosophy of Physics. Twenty-first-century perspectives (Jan Faye & Henry J. Folse, eds.) Bloomsbury Academic: London, pp.335-366.

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Schrödinger wave lives in configuration space

An example of a simile in discussing science:

"In other words, the Schrödinger wave in the case of a many-particle system cannot be a physical wave in three-dimensional space (which would be an 'ordinary conception') since it 'lives' in a high-dimensional mathematical space.
… we have to assume that he [Neils Bohr] realised the consequences of the superposition principle when he argued that the wave function lives in configuration space."

Dieks, Dennis (2017) Neils Bohr and the formation of quantum mechanics, in, Neils Bohr and the Philosophy of Physics. Twenty-first-century perspectives (Jan Faye & Henry J. Folse, eds.) Bloomsbury Academic: London, pp.303-333.

The first use here marks the term 'lives' as a simile by using inverted commas, but later the term is used unmarked (as in a metaphor).

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Read about metaphor in science

Read about examples of science metaphors

Many examples of science metaphors are listed in 'Creative comparisons: Making science familiar through language. An illustrative catalogue of figurative comparisons and analogies for science concepts'. Free Download.

complementarity in quantum mechanics is like a reference frame in relativity

An example of the use of analogy in developing science:

"In spite of many points in which they differ, there is a profound inner similarity between the problems met with in the theory of relativity and those which are encountered in the quantum theory. In both cases we are concerned with the recognition of physical laws which lie outside the domain of our ordinary experience and which present difficulties to our accustomed forms of perception."

"The very nature of the quantum theory thus forces us to regard the space-time co-ordination and the claim of causality, the union of which characterises the classical theories, as complementary but exclusive features of the description, symbolising the idealisation of observation and definition respectively. Just as the relativity theory has taught us that the convenience of distinguishing sharply between space and time rests solely on the smallness of the velocities ordinarily met with compared to the velocity of light, we learn from the quantum theory that the appropriateness of our usual causal space-time description depends entirely upon the small value of the quantum of action as compared to the actions involved in ordinary sense perceptions."

"We have learned from the theory of relativity that the expediency of the sharp separation of space and time, required by our senses, depends merely upon the fact that the velocities commonly occurring are small compared with the velocity of light. Similarly, we may say that Planck's discovery has led us to recognise that the adequacy of our whole customary attitude, which is characterized by the demand for causality, depends solely upon the smallness of the quantum of action in comparison with the actions with which we are concerned in ordinary phenomena."

Bohr, Neils (1934) Atomic theory and the description of nature. Cambridge University Press

"Just as the general concept of relativity expresses the essential dependence of any phenomenon on the frame of reference used for its coordination in space and time, the notion of complementarity serves to symbolise the fundamental limitation, met with in atomic physics, of the objective existence of phenomena independent of their means of observation."

Neils Bohr (2010) Atomic Physics and Human Knowledge (first published 1961). Dover Publications, Inc.

"This general view can be made by way of analogy to relativity. Analogies to relativity are common but often brief in Bohr's work. With relativity we learn that any ascription of position and momentum is relative to some reference frame and that those properties are not absolute; rather, they are aspects of phenomena as they occur relative to a reference frame. Similarly, we learn something about properties in general from quantum mechanics: we learn that properties are not absolute but are aspects of phenomena as they occur in a measurement content. According to this view, complementarity is something we discover from quantum mechanical structure when we learn that there is no description of physical reality that is not measurement-frame dependent

The analogy is that measurement results are relative to a measurement context similarly to how space-time measurements are relative to an inertial frame of reference…

In relativity we might say that the space-time interval in some sense represents non-relative physical facts about the relation between two events, but that a space-time interval has different empirical meaning in different frames. Similarly we might say that the quantum state of a composite system represents non-contextual physical facts about the relation between subsystems, but that a quantum state has different empirical meaning in different measurement contexts."

Tanona, Scott (2017) Individuality and correspondence. An exploration of the history and possible future of Bohrian Quantum empiricism, in, Neils Bohr and the Philosophy of Physics. Twenty-first-century perspectives (Jan Faye & Henry J. Folse, eds.) Bloomsbury Academic: London, pp.253-288.

This is different from many of the analogies discussed on this site as (a) it is an analogy from one scientific concept to another (rather than comparing a scientific concept or phenomenon to something familiar everyday referent); (b) this is an analogy actively used in the development of the science itself, for use within the scientific community, not just for communicating scientific ideas to lay people .

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hydrogen solubility in metals is a new holy grail

An example of the use of a metaphor which could be considered an English idiom:

"It is conceivable within such a model that hydrogen might be rejected into the outer core as the inner core crystallised. The mismatch of concentrations with the mantle would then encourage hydrogen to diffuse into the magma where solubility changes for different temperatures and pressure could cause it to degas from the solution. However, this all hinges on guesswork around the solubility of hydrogen in metals at the relevant temperatures and pressures, which experiments struggle to verify, since the equipment needed to achieve those conditions is incompatible with taking direct measurements. 'Hydrogen solubility in metal as a function of temperature and pressure is one of the new holy grails, I would say, of planetary research,' says Young [Edward Young at the University of California in Los Angeles]."

Demming, A. (2023, September). The hunt for natural hydrogen reserves. Chemistry World, 20(9), 48-51. https://www.chemistryworld.com/features/the-hunt-for-natural-hydrogen-reserves/4017747.article

Read about communicating science through idioms

bacterium is like a tiny attack submarine

An example of metaphor and simile in science journalism

"…while I was working in antibiotic discovery, I barely managed to even annoy real bacteria, much less kill them!

That's because they live fundamentally different sorts of lives. Human cells are surrounded by their close friends and partners, and they have the standing army of the immune system to protect them. They have their waste hauled away and their food delivered, and they're constantly being monitored for any signs of distress. Bacteria, though, are living their lives in the natural state as described by Thomas Hobbes in Leviathan: a war of all against all, where life is 'solitary, poor, nasty, brutish, and short'. Compared to a typical eukaryotic cell, a free-living bacterium is like a tiny attack submarine. It's far more mobile and well-armoured, and it has to take care of its own defence while seeking out its own food sources (all while surrounded by organisms that are trying to do likewise!)"

Lowe, D. (2023, September). Surviving in the war of all against all. Chemistry World, 20, 10. https://www.chemistryworld.com/opinion/surviving-in-the-war-of-all-against-all/4017921.article

I have classed the submarine comparison as a simile rather than an analogy, although reasons are given for the comparison and a contrast is made (bacterium to a eukaryotic cell) as it is not suggested what the eukaryotic cell is like (perhaps a ship in a protected convey?)

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Many examples of science metaphors are listed in 'Creative comparisons: Making science familiar through language. An illustrative catalogue of figurative comparisons and analogies for science concepts'. Free Download.

Read about similes in science

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Many examples of science similes are listed in 'Creative Comparisons: Making Science Familiar through Language. An illustrative catalogue of figurative comparisons and analogies for science concepts'. Free Download.

However, overall there is an analogy here, in that human cells are living in something akin to civilised communities, compared to the 'natural' state that Hobbes suggested characterised pre-communal living.

many bacteria have a sort of gearing system

An example of simile in science journalism:

"Tumour cells are often fundamentally unstable, barely staying ahead of their own chromosomal aberrations, but many bacteria have a sort of gearing system. Under stress, they will switch to more error-prone replication modes. This emergency system is a survival advantage (which is why it's persisted): with a greater number of mutations, the chances of producing new variant cells that can survive is increased. It's true that many of these mutations will be of little help, or might even cause the cells carrying them to die more quickly, but this mechanism only gets activated when the bacteria are in danger of dying off anyway if nothing is done."

Lowe, D. (2023, September). Surviving in the war of all against all. Chemistry World, 20, 10. https://www.chemistryworld.com/opinion/surviving-in-the-war-of-all-against-all/4017921.article

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Many examples of science similes are listed in 'Creative Comparisons: Making Science Familiar through Language. An illustrative catalogue of figurative comparisons and analogies for science concepts'. Free Download.

total internal reflection can be frustrated

An example of a simile in science:

"The case of so-called frustrated total internal reflection, unaccounted for by geometric optics, is responsible for the phenomenon of evanescent light waves at the overlap of two transparent media. When light rays reflect within a denser medium (glass) and the medium is interrupted by a barrier of a less dense medium (e.g., air), they will not all reflect back and stay within the portion of the denser medium preceding the barrier. Wave optics suggests that a small portion of spherical waves will break into the air. Louise de Broglie realised early on that by analogy with light waves and the wave optics of refraction, matter-waves in a similar situation will penetrate into classically inaccessible regions of energy, with the energy of the resulting wave decreasing."

Perović, Slobodan (2017) Complementarity and quantum tunneling, in, Neils Bohr and the Philosophy of Physics. Twenty-first-century perspectives (Jan Faye & Henry J. Folse, eds.) Bloomsbury Academic: London, pp.207-222.

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Many examples of science similes are listed in 'Creative Comparisons: Making Science Familiar through Language. An illustrative catalogue of figurative comparisons and analogies for science concepts'. Free Download.

The extract also discusses how scientific ideas can progress by analogy.

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Many examples of science analogies are listed in 'Creative comparisons: Making science familiar through language. An illustrative catalogue of figurative comparisons and analogies for science concepts'. Free Download.

particle tunnels through a hill

An example of a metaphor adopted into scientific nomenclature

"Quantum tunneling was initially conceptualised as a penetration of, or leaking through, a barrier or a hill. A particle with energy lower than the energy it takes to overcome an obstacle, a potential hill[,] can occasionally 'tunnel' through it. It is the effect of a particle tunneling through an obstacle [which would be] forbidden in classical mechanics."

Perović, Slobodan (2017) Complementarity and quantum tunneling, in, Neils Bohr and the Philosophy of Physics. Twenty-first-century perspectives (Jan Faye & Henry J. Folse, eds.) Bloomsbury Academic: London, pp.207-222.

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Read about examples of science metaphors

Many examples of science metaphors are listed in 'Creative comparisons: Making science familiar through language. An illustrative catalogue of figurative comparisons and analogies for science concepts'. Free Download.

cloud chamber track is a footprint

An example of metaphor in science scholarship:

"Sometimes, as in the case of the formation of quantum mechanics, this will involve seemingly mutual exclusive concepts – for example, tracks in a cloud chamber can be interpreted either as an ionisation path left by a particle that whizzed by, or as a footprint of the ionisation of an atom."

Perović, Slobodan (2017) Complementarity and quantum tunneling, in, Neils Bohr and the Philosophy of Physics. Twenty-first-century perspectives (Jan Faye & Henry J. Folse, eds.) Bloomsbury Academic: London, pp.207-222.

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Many examples of science metaphors are listed in 'Creative comparisons: Making science familiar through language. An illustrative catalogue of figurative comparisons and analogies for science concepts'. Free Download.

quantum/classical is like baldness/hairiness

An example of analogy in science scholarship:

"Even though the concept of 'being bald' is vague – in certain cases we don't know how to distinguish between a bald person and a hairy one, and if we pluck one hair at a time from a hairy person, there is no moment at which she becomes bald – at the extremes of the spectrum there is still a clear-cut distinction between baldness and hairiness. Likewise in the quantum/classical case: this fact, for Bohr, is enough."

Dorato, Mauro (2017) Bohr's relational holism and the classical-quantum interaction, in, Neils Bohr and the Philosophy of Physics. Twenty-first-century perspectives (Jan Faye & Henry J. Folse, eds.) Bloomsbury Academic: London, pp.133-154.

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Many examples of science analogies are listed in 'Creative comparisons: Making science familiar through language. An illustrative catalogue of figurative comparisons and analogies for science concepts'. Free Download.

representationalism is a disease infecting physicists

An example of metaphor in science scholarship:

"By nature we are born realists. There is a world outside of outside, and it is more or less as we experience it. This kind of common-sense realism is included as part of our innate cognitive understanding of the world. But it is the same instinct that drives many physicists to interpret their theories realistically. The disease which infects those physicists is not realism as such but representationalism, the view that 'knowing' something means being able to 'picture' what something looks like when nobody is looking at it, a canvas of reality painted by a ghost spectator."

Faye, Jan (2017) Complementarity and pragmatic epistemology: a comparison of Bohr and C. I. Lewis, in, Neils Bohr and the Philosophy of Physics. Twenty-first-century perspectives (Jan Faye & Henry J. Folse, eds.) Bloomsbury Academic: London, pp.115-131.

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Many examples of science metaphors are listed in 'Creative comparisons: Making science familiar through language. An illustrative catalogue of figurative comparisons and analogies for science concepts'. Free Download.

bacteriophages make sure bacteria do not dominate

An example of everyday comparisons and anthropomorphism (and/or teleology) in public science discourse:

"It's been estimated, not by myself, that there are a trillion bacteriophages for every grain of sand on the planet….

So the phages themselves are essentially a piece of genetic information so that could be DNA or RNA, that's wrapped into a sort of protein coat, a protective jacket if you like. And phages range anywhere from 24 to 200 billionths of a metre [or nanometres] in size…so to sort of put that into some perspective, you could fit between five hundred and four thousand of them across the diameter of a human hair, and they are regulating bacterial populations, both within our bodies, but also really importantly within, across the environment as well. So, what they are very good at doing is regulating and controlling and shaping bacterial populations, making sure we do not see bacterial dominance occur."

Prof. James Ebdon

James Ebdon (Professor of Environmental Microbiology at the University of Brighton) was talking on an episode ('Bacteriophages') of 'In Our Time'

There are two quotidian comparisons here relating something of an unfamiliar scale (the numbers and sizes of phages) to what listeners can readily imagine (sand on earth, hair), as well as the metaphor of the protein coat or jacket.

The phrasing here also seems to suggest either that bacteriophages deliberately control bacterial populations (which would be anthropomorphic, talking of them in the way one would of human agents) or that they they have a purpose within the scheme of nature (teleology).

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Read about teleology in science

Read examples of teleological (pseudo)explanations for scientific phenomena

Read about types of pseudo-explanations

Examples of teleological statements are included in a document listing a wide range of examples of science analogies, similes, metaphors and the like, drawn from diverse sources, which can be downloaded using this link: 'Creative Comparisons: Making Science Familiar through Language. An illustrative catalogue of figurative comparisons and analogies for science concepts.'