{
  "annotation_id": "6314b691-ecf7-4044-93c7-71cc96c67eb5",
  "date_created": "2026-03-02T18:00:50.480000Z",
  "date_modified": "2026-03-02T18:00:50.480000Z",
  "file_hash": "dcf9d8dfb16b0a564ebfe961f83028abecfac7fcc54f39ecb65d1f5146d4dac9",
  "private": false,
  "record": {
    "abstract": "If isotropy of space and homogeneity of space and time are the valid laws of\nnature then one can show that velocity of any signal (whether it is light in a\nvacuum or in a medium or something having constant velocity in the rest frame\nof the observer and by using which we can perform all (but not partial)\nmeasurements of all physical quantities related with the particular experiment)\nis constant in all inertial frames. To verify this constancy for other signals\napart from light in vacuum (which is well-known) we have proposed particularly\none experiment in which all measurements can be done using light in water as\nsignal. If we perform experiment in a medium then the signal connecting the\nmeasurements of an event in two inertial frames can not be light in vacuum\nrather it is light in the medium. In such cases where signal used for\nmeasurement is not light in vacuum, relativistic relationships of various\nphysical quantities in Special Theory of Relativity (in which light in vacuum\nhas been used as signal) require modifications. This work might be verified\nfrom the analysis related with the number of cosmic muons reaching earth\nthrough atmosphere or that related with the amount of oscillation of\natmospheric neutrinos as in both these cases signal for our measurement can not\nbe light in vacuum but it is light in air.",
    "arxiv_id": "physics/0406024",
    "authors": [
      "Rathin Adhikari"
    ],
    "categories": [
      "physics.gen-ph"
    ],
    "title": "Constancy of any signal velocity in all inertial frames",
    "url": "https://arxiv.org/abs/physics/0406024"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "a51faacf-67d2-490b-95e7-ed16649c116c",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}