Preprint Article Version 2 Preserved in Portico This version is not peer-reviewed

Light Dispersion in Gravitational Field

Version 1 : Received: 8 July 2022 / Approved: 11 July 2022 / Online: 11 July 2022 (02:25:35 CEST)
Version 2 : Received: 18 August 2022 / Approved: 19 August 2022 / Online: 19 August 2022 (08:04:34 CEST)
Version 3 : Received: 31 July 2023 / Approved: 1 August 2023 / Online: 2 August 2023 (02:29:05 CEST)

How to cite: Zhu, Y. Light Dispersion in Gravitational Field. Preprints 2022, 2022070145. https://doi.org/10.20944/preprints202207.0145.v2 Zhu, Y. Light Dispersion in Gravitational Field. Preprints 2022, 2022070145. https://doi.org/10.20944/preprints202207.0145.v2

Abstract

In any region of a space, the gravitational field cannot be eliminated. The speed of light in a vacuum has never been observed and cannot be observed with current technology. Till now, only the speed of light in a gravitational field has been observed. Here, it is presented that light could be dispersion in a gravitational field analogous to the dispersion of light in the Newtonian prism experiment. The relativistic mass density on the surface of a neutron star is on the level of 1017kgm-3 while on the surface of the Earth is only 6.63*10-7kgm-3, the speed of light acted by the gravitational field of a neutron star is much larger than that by the Earth. Therefore, light dispersion in strong gravitational field could be generally observed from the picture of a star and it should have been observed through the spectroscopic binary system.

Keywords

dispersion of light; gravitational field; fundamental physics constant; vacuum; speed of light; spectroscopic binary system; double gravitational lens

Subject

Physical Sciences, Particle and Field Physics

Comments (1)

Comment 1
Received: 19 August 2022
Commenter: yin zhu
Commenter's Conflict of Interests: Author
Comment: Added the double gravitational lens as one evidence. The author thinks this is a complete solid evidence. It is the added content:
If light is dispersion in gravitational field, it shall be generally observed. The first evidence for the dispersion of light in gravitational field is the double gravitational lens. The two conditions are needed to form double gravitational lens. 1) There are two light curves. 2) There are different speeds and refractive angles for the two curves. The two conditions can just be produced from the dispersion of light in gravitational field. As a light ray is running through a strong field, it is being bent by the field. In the same time, it is being dispersed into two light curves with different speed and different refractive angle. It is emphasized, if a light ray could not be splitted into two rays, the double gravitational lens should not be formed. In 1995, Pelt and coworkers[11] presented that the double gravitational lens is originated from two different light curves. The time delay between the two light curves is determined with that one of the light curves is shifted by the dispersion spectra. They explained the time delay of QSO of 0957+561. With Pelt and coworkers’ conclusion, Burud and coworkers[12] explained the gravitationally lensed double QSO B1600+434. Therefore, although Pelt and coworkers[11] did not think that this dispersion spectra is related with the gravitational field, they used the key point in the concept of the dispersion of light in gravitational field: two light curves is shifted by dispersion spectra. Their description is almost as that described with our Figures 1 and 2 although the physical reason of the dispersion spectra in their work is different. It is shown that the dispersion of light in gravitational field is needed to wholly understand the double gravitational lens.
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