Time varying velocity of light

TL;DR

This paper discusses a hypothesis that the speed of light decreases over the universe's age, supported by cosmological models and previous suggestions linking red shifts to boundary regions of the universe.

Contribution

It revisits and reproduces a space-time interaction hypothesis predicting a decreasing light velocity with cosmic age, connecting it to quasar red shifts and early universe boundary regions.

Findings

Velocity of light decreases with universe age.

Red shifts in quasars linked to boundary regions.

Supports the hypothesis of time-varying light speed.

Abstract

Recently there has been a lot of intersest in the superluminal phenomena, and time varying velocity of light cosmological models. More than two decades ago at Einstein centenary symposium, Nagpur I had put forward space-time interaction hypothesis. One of its predictions was that velocity of light decreased with the age of Universe. In view of the profoundness of the hypothesis the original paper is reproduced here. We also mention that in a paper "Quasars, Tachyons and the early universe" proc. Einstein found. Intnl. 2(3), 1985 pp 69-75, it was suggested that, "The boundary region of the universe being the source of radiation, the slowing down of the speed of radiation from $4.4 \times 10^{10}$ cm/sec at $t_A = 10^{10}$ yrs. to the present value of $3 \times 10^{10}$ cm/sec should show up as a large red shifts. The successive boundary region radiations at various epoch will give rise to a wide range of red shifts. Therefore, defining quasars as the objects having two properties: large red shifts and powerful emission of radiations, we would like to identify these objects as the boundary regions of the universe".