Cookie Policy
Cookies help operate the site, remember preferences, measure performance, and support advertising when enabled.
Types of cookies
Essential cookies support security and site functionality. Preference cookies may remember display choices. Analytics cookies help measure page performance and content usefulness. Advertising cookies may support ad delivery and measurement where consent allows.
Third-party services
Analytics, advertising, embedded media, and affiliate services may set cookies according to their own policies. PhysicsTheories.com keeps ads labeled and separate from editorial material.
Why cookies may be useful
Cookies can help remember a display preference, measure whether a calculator or article is working well, reduce repeated prompts, and support fraud prevention. They are not required for reading the core educational pages, formulas, or glossary entries.
Advertising cookies
If advertising cookies are enabled, they may help ad systems measure impressions, limit repetition, and select ads. Advertising cookies do not decide what a physics page says, which equation is recommended, or how an editorial correction is handled.
Analytics cookies
Analytics cookies help answer practical publishing questions such as which pages load slowly, which topic hubs are useful, and where readers leave the site. Those measurements support better navigation, stronger internal links, and clearer explanations.
Consent changes
A reader can change cookie preferences by using browser controls, clearing stored data, or blocking third-party cookies. If a browser blocks cookies, some convenience features may reset, but the main library remains available.
Cookies and educational access
The educational pages, formulas, calculators, and glossary entries should remain readable even when nonessential cookies are blocked. A reader may lose convenience features or personalized settings, but the core physics content should not depend on advertising consent.
Performance measurement
Some cookies or local storage entries may support performance measurement. Those signals help identify slow pages, broken interactions, and navigation problems that prevent readers from reaching the correct physics resource.
Cookie review standard
When adding a new script or service, the site should ask whether the cookie is essential, analytical, advertising-related, or unnecessary. Nonessential scripts should provide enough value to justify their effect on privacy, page speed, and reader trust.
Examples of essential storage
Essential storage may support security, consent state, or a display preference such as dark mode. These features help the site function and do not require tracking a reader across unrelated websites.
Examples of analytics storage
Analytics storage may show that a calculator fails on mobile, a topic directory is difficult to navigate, or an article takes too long to load. These signals are useful because they point to site improvements rather than personal profiling.
Examples of advertising storage
Advertising storage may help measure whether an ad was shown or limit repeated ads. Ads should remain labeled, visually separated, and secondary to the educational explanation on the page.
Cookies and page speed
Cookie-setting scripts can slow pages if they load too early or too often. For SEO and reader experience, nonessential scripts should load after the main content so physics explanations remain fast and accessible.
Cookie inventory maintenance
The cookie inventory should be reviewed when analytics, advertising, embedded media, or interactive tools change. A service that no longer improves reader experience, measurement, security, or site funding should be removed so the page remains simpler and faster.
Reader-first default
The default cookie posture is conservative: load what is needed for the page to work, delay what is optional, and avoid adding scripts that slow down the learning experience without clear benefit.
Practical review cadence
Cookie behavior should be checked during major site updates, advertising changes, analytics changes, and performance audits so the policy continues to match the actual site.
Managing cookies
Readers can clear or block cookies in their browser. Some features may work less smoothly if cookies are disabled, but the educational content remains accessible.