{"version":"https://jsonfeed.org/version/1","title":"Adrijan Josić - physics papers","home_page_url":"https://adrijanjosic.com","description":"Adrijan Josić - physics papers","author":{"name":"Adrijan Josić - physics papers"},"items":[{"id":"https://adrijanjosic.com/f/three-classical-tests-of-genrelativity-from-one-refractive-index","html_content":"<p>We observe that the three classical tests of general relativity—gravitational redshift, Shapiro time delay, and light deflection—all follow from a single function: the effective refractive index n(ρ) = 1 + 2GM/c^2ρ that ...</p>","url":"https://adrijanjosic.com/f/three-classical-tests-of-genrelativity-from-one-refractive-index","title":"Three classical tests of gen.relativity from one refractive index","summary":"We observe that the three classical tests of general relativity—gravitational redshift, Shapiro time delay, and light deflection—all follow from a single function: the effective refractive index n(ρ) = 1 + 2GM/c^2ρ that ...","date_modified":"2026-06-23T11:15:50Z"},{"id":"https://adrijanjosic.com/f/the-grav-clock-rate-as-a-unifying-concept-in-intro-relativity","html_content":"<img src=\"https://img1.wsimg.com/isteam/ip/85384a2c-7756-485b-ae8f-021125dd310d/Screenshot%202026-06-23%20at%2012.43.03-a86a461.png\"/><p>Gravitational time dilation, gravitational redshift, gravitational potential energy, gravitational force, kinetic energy, geodesic energy conservation, and gravitational binding energy are typically introduced as separat...</p>","url":"https://adrijanjosic.com/f/the-grav-clock-rate-as-a-unifying-concept-in-intro-relativity","title":"The grav. clock rate as a unifying concept in intro. relativity","summary":"Gravitational time dilation, gravitational redshift, gravitational potential energy, gravitational force, kinetic energy, geodesic energy conservation, and gravitational binding energy are typically introduced as separat...","date_modified":"2026-06-23T11:09:17Z"},{"id":"https://adrijanjosic.com/f/mercurys-perihelion-advance-from-a-speed-budget","html_content":"<p>We derive the first post-Newtonian test-particle Lagrangian from the observation that the isotropic Schwarzschild metric assigns every particle a speed budget: the coordinate speed of light is c/n, where n(ρ) = 1 + 2GM/c...</p>","url":"https://adrijanjosic.com/f/mercurys-perihelion-advance-from-a-speed-budget","title":"Mercury's perihelion advance from a speed budget","summary":"We derive the first post-Newtonian test-particle Lagrangian from the observation that the isotropic Schwarzschild metric assigns every particle a speed budget: the coordinate speed of light is c/n, where n(ρ) = 1 + 2GM/c...","date_modified":"2026-06-23T11:06:22Z"}]}