Fundamental Fields
Explore how theoretical physics uses quantum fields, symmetries, gravity, particle interactions, and mathematical models to describe fundamental physical phenomena.
- Quantum field theory
- String theory
- Gravity
- Cosmology
Fields · Molecules · Populations
The explanation can change when the scale of observation changes.
Lens & Level connects theoretical physics, molecular biophysics, and population health to examine how models, measurements, mechanisms, and uncertainty operate at fundamentally different levels.
Independent educational resource
Observation levels / 03
10⁻⁹
Field
Fundamental physics
Which theoretical structures can describe interactions at fundamental scales?
- quantum fields
- gravity
- particles
- cosmology
10⁰
Molecule
Transport and structure
How do structure and dynamics control movement through molecular systems?
- electron transfer
- energy transport
- DNA
- proteins
10⁶+
Population
Health and society
How do social conditions shape patterns of health across groups?
- inequality
- migration
- policy
- life course
Model · Mechanism · PopulationAbstract scale cues, not literal equivalence
Four levels of explanation
Different levels require different evidence and different caution.
Explore four ways scientific questions are framed across fundamental, molecular, biological, and population scales.
Molecular Transport
Study how electrons and excitation energy move through molecules, proteins, DNA, molecular junctions, and dynamically fluctuating environments.
- Electron transfer
- Energy transfer
- Molecular electronics
- Chemical physics
Structure & Dynamics
Examine why molecular structure alone is not enough and how motion, solvation, conformational change, and environmental fluctuations can alter biological or chemical function.
- Biophysics
- Molecular dynamics
- Proteins
- DNA
Population Health
Explore how migration, socioeconomic conditions, welfare policies, life-course processes, and social inequalities shape population health.
- Health inequalities
- Migration
- Social determinants
- Epidemiology
When the level changes
Moving between levels changes what can reasonably count as an explanation.
Transition AField → Observable
How can an abstract theoretical framework lead to predictions that can be compared with physical observations?
theory · quantum fields · scattering · cosmology · prediction
Transition BStructure → Transport
How can molecular structure and dynamics influence charge or energy transfer?
electron transfer · molecular dynamics · pathways · coupling
Transition CIndividual → Population
How do individual outcomes become population patterns without losing social context?
epidemiology · migration · inequality · policy · population
The scale check
Name the level before choosing the explanation.
- 01
Set the level
Define whether the question concerns fields, molecules, individuals, groups, or populations.
- 02
Identify the observable
State what is actually measured, calculated, recorded, or estimated.
- 03
Choose the model
Select a model appropriate to that level rather than importing one from another scale without justification.
- 04
Compare evidence
Test predictions, mechanisms, experiments, datasets, or alternative interpretations.
- 05
Limit the claim
State clearly what the evidence supports at this level and what cannot be inferred at another level.
Educational reference points
Six researchers working across fundamental, molecular, and population scales.
These profiles are presented as educational reference points for exploring public academic work. They are not presented as members, employees, partners, collaborators, representatives, endorsers, or affiliates of Lens & Level.
STPlatform contact
United KingdomSteve Thomas
Queen Mary University of London · School of Physical and Chemical Sciences · Centre for Research in String Theory
Emeritus Professor in Theoretical Physics
Academic work in theoretical high-energy physics, including string theory, particle phenomenology, cosmology, gravity and supergravity, D-brane systems, supersymmetry, inflationary models, and high-energy scattering in gravitational and string-theoretic frameworks.
INSPIRE author profile 986195
SSPlatform contact
CyprusSpiros S. Skourtis
University of Cyprus · Department of Physics · Theoretical and Computational Biophysics and Molecular Physics
Professor
Theoretical and computational research in biophysics, molecular physics, chemical physics, and molecular electronics, with particular emphasis on charge and energy transport in molecular, biomolecular, cellular, and single-molecule systems.
ORCID 0000-0002-5834-248X
SJPlatform contact
SwedenSol Juarez
Stockholm University · Department of Public Health Sciences
Professor of Public Health Sciences
Research in public health with particular attention to health inequalities, social determinants of health, migration and health, maternal and child health, life-course epidemiology, welfare policies, and differences in health outcomes across social groups.
ORCID 0000-0001-9086-7588
AREducational reference point
United KingdomArttu Rajantie
Imperial College London · Faculty of Natural Sciences · Department of Physics · Theoretical Physics Group
Professor of Theoretical Physics
Research in quantum field theory, cosmology, particle physics, the early Universe, Higgs-field dynamics, magnetic monopoles, topological defects, and non-linear physical processes.
ORCID 0000-0002-6406-4412
DBEducational reference point
United StatesDavid N. Beratan
Duke University · Department of Chemistry · Biochemistry and Physics
R.J. Reynolds Distinguished Professor of Chemistry
Theoretical and computational research on complex molecular and macromolecular systems, including biological charge and energy transport, electron-transfer pathways, molecular conductivity, nucleic-acid transport, molecular design, chemical mechanisms, and relationships between molecular structure and function.
ORCID 0000-0003-4758-8676
MREducational reference point
SwedenMikael Rostila
Stockholm University · Department of Public Health Sciences
Professor of Public Health Science · Associate Professor of Sociology
Research on health inequalities and the social determinants of health, including migration and health, social networks and social capital, mortality, bereavement, infectious-disease inequalities, and relationships between welfare structures and population health.
ORCID 0000-0002-6973-0381
Reference status
Academic reference does not imply participation.
Lens & Level is an independent educational prototype. Academic names and institutional references are included solely to help readers discover relevant areas of public scholarship.
The first three platform contact addresses were supplied specifically for this site. They are not presented as verified personal, university, institutional, or employer-provided email accounts.
The remaining profiles are educational reference points only and are not presented as participants in, contributors to, endorsers of, or affiliates of this resource.
Study notes
Open a note and examine what changes when the scale changes.
Browse educational notes across theoretical physics, molecular transport, biophysics, epidemiology, and population health.
10 notes
Theoretical Physics
What is a quantum field?
Explore why modern particle physics describes fundamental entities using fields rather than only classical particles.
String Theory
Why do physicists study strings and higher-dimensional objects?
Explore how extended objects appear in theoretical attempts to connect gravity and quantum physics.
High-Energy Physics
What does scattering tell physicists about interactions?
Explore why collisions and scattering processes can reveal the structure of physical theories.
Molecular Physics
How does an electron move between molecular sites?
Explore electron transfer as a competition between coupling, energetics, structure, and environmental motion.
Biophysics
Why can molecular motion change transport?
Explore why biological molecules should not be treated as perfectly rigid structures.
Molecular Electronics
Can DNA participate in long-distance charge transport?
Explore why charge transport through DNA depends on sequence, structure, pathways, and surrounding conditions.
Public Health
What are social determinants of health?
Explore why health differences cannot always be understood through biology or individual behavior alone.
Migration & Health
Why can migration and health be related in complex ways?
Explore why migration status alone does not explain population health.
Epidemiology
Why does population evidence require careful interpretation?
Explore the difference between an association observed in a population and a mechanism operating in an individual.
Scale Reasoning
Can one explanation work at every scientific scale?
Compare theoretical fields, molecular mechanisms, and population patterns.
No study notes match your search.
About Lens & Level
Scientific explanations depend on where we place the lens.
Lens & Level is an independent educational prototype connecting theoretical physics, molecular biophysics, and population health.
It does not suggest that quantum fields, electron transport, and social health inequalities can be explained using the same models.
Instead, it examines how scientific reasoning changes when the unit of analysis, measurement strategy, mechanism, or scale changes.
It is not a university, laboratory, healthcare provider, research institute, publisher, scientific society, or commercial service.
Scale defines the question
A useful explanation begins by identifying which level of a system is actually being studied.
Mechanisms are level-specific
A mechanism at one level does not automatically provide a complete explanation at another.
Evidence sets limits
Models become useful when researchers make clear what is measured, what is inferred, and where uncertainty remains.
Change the level
Choose one question and ask what changes when you move the lens.
Explore study notes, compare scientific scales, and examine how models, mechanisms, and population evidence support different forms of explanation.