Interactive calculators, formula deep-dives, 109 in-depth articles, a unit converter, and exam prep — built around how physics actually gets learned.
Press ⌘K or Ctrl+K to search anything.
Three of the highest-traffic doorways into the library. Each is content-dense and links into everything else.
Force, kinetic energy, work, projectile motion, Ohm's law, escape velocity — every result with a full derivation.
Open calculator hub →Convert across energy, length, mass, force, pressure, time, and temperature — with the formula and dimensional check shown alongside each result.
Open converter →12 self-contained learning tracks from mechanics through cosmology — pick one and follow a curriculum, not random pages.
Pick a track →Most physics sites stop at isolated articles. This one is being rebuilt as a coherent learning environment, with tracks that help readers understand what to learn first, what to pair together, and where the hard jumps usually happen.
Start with force, energy, momentum, waves, optics, and introductory electricity before moving into calculus-heavy material.
Open the beginner path →Use the formula library and theory guide together to connect derivations with conceptual meaning and common exam traps.
Browse core equations →Move from Planck and Einstein to the uncertainty principle, the Standard Model, and the research questions that remain open.
Study modern physics →See how physics ideas show up in imaging, surgery, fluids, and decision-making under uncertainty.
Read the journal →Each pillar page is written to hold attention long enough to teach something real, with linked tools and companion pages that help readers keep moving.
An anchor page for mechanics, relativity, quantum theory, cosmology, and frontier ideas, built as an expandable reference rather than a skim-only list.
Explore theories →Core physics formulas sorted by level and category, with search, filtering, calculators, and deep dives that explain what each expression actually means.
Open formula library →From black holes and the CMB to dark matter and cosmic futures, this section explains how the universe behaves on the largest scales.
Explore the cosmos →Wave-particle duality, uncertainty, entanglement, and a simple energy-level explorer help make the microscopic world feel less mystical.
Study quantum mechanics →A higher-level section covering Lagrangians, gauge symmetry, renormalization, string theory, loop quantum gravity, and open problems.
Go deeper →Practice retrieval, scan a historical overview, and look up unfamiliar language without leaving the site ecosystem.
Practice and revise →Access the Master Kinematics Solver, generate printable AP Physics Exams, and explore the Orbital Gravity Simulator.
Kinematics Solver → Exam Generator → Orbital Simulator →Long-form articles connecting fundamental physics to real clinical and scientific applications.
From nuclear spin to resonance: the quantum mechanics and electromagnetism behind magnetic resonance imaging.
Poiseuille's law, Reynolds numbers and turbulence applied to cardiovascular physiology and hemodynamics.
Momentum, kinetic energy and thermodynamics applied to injury patterns and surgical decision-making.
PhysicsTheories.com is built around one principle: every page should either teach something concrete or guide the reader to their next step. From high-school mechanics to PhD-level quantum field theory, every formula, quiz question, and journal article is written to hold up under scrutiny.
Each formula in our library has a full Deep Dive page with four educational levels, a worked example, a mathematical derivation, and common mistakes. The 500-question quiz bank covers 9 topics at 3 difficulty levels. The journal connects physics to real clinical and scientific applications.
A practical explainer that connects resonance, magnetic fields, and signal generation to one of the most important imaging tools in modern medicine.
Read the article →A useful bridge between textbook fluid mechanics and the hemodynamics clinicians and students need to reason through real systems.
Read the article →Ad-supported educational publishing only works when readers can easily understand who is behind the site, how content is reviewed, how to request corrections, and how advertising is handled.
The publication background, audience, coverage map, and correction workflow are all surfaced in one place instead of buried in generic boilerplate.
Read about the site →Readers can see how pages are sourced, updated, and distinguished from speculation, opinion, or unresolved debate.
View editorial policy →Ads are labeled, separated from content, and described in plain language so monetization does not feel hidden or manipulative.
Read the disclosure →A reader should never wonder how to report an error, suggest a topic, or ask a legitimate question about the publication.
Contact the editors →Editor-in-chief and lead author. PhysicsTheories.com is an independent publication — every article is written, edited, and fact-checked in-house against primary sources and peer-reviewed references.
500 questions across classical mechanics, quantum physics, astrophysics, electromagnetism, thermodynamics, waves, nuclear, and medical physics — filtered by topic and difficulty.
🧠 Start the quizYes. The new study paths are designed to help readers move from fundamentals into modern topics without bouncing randomly between unrelated pages.
No. The site aims to be laddered, which means beginners can enter through formulas and study tracks while advanced readers can jump directly into theoretical pages.
Because trustworthy educational publishing depends on clear ownership, correction routes, and transparent ad practices — readers deserve to know who is behind the content and how errors get fixed.
Yes. The journal is now framed around physics in practice and interdisciplinary interpretation rather than placeholder publishing or artificial posting volume.
These directories give readers and search engines a clear path from the homepage into articles, calculators, conversions, FAQs, examples, and history pages.
Long-form explainers with context, equations, and related topics.
Browse articles →Short answers connected to deeper guides and study checks.
Browse FAQ →Interactive physics unit conversions with worked context.
Open converter →Side-by-side physics concepts organized by search intent.
Browse comparisons →Misconceptions and exam traps repaired with reasoning checks.
Avoid mistakes →The complete static directory for every public page.
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