After the light interacts with the medium, all the characteristics of the light will be changed, including but not limited to the transmission direction of the light, the phase of the light, the amplitude of the light, the frequency of the light, the wavelength of the light, the speed of the light, etc. However, people's understanding of what light is is still not completely unified. Some people think that light is an electromagnetic wave, some think that light is a photon, and some even think that light has a wave-particle duality. Through my long-term research, I found that light is neither an electromagnetic wave nor a photon, nor does it have wave-particle duality. Light is only one of the manifestations of Coulomb force and magnetic force that exists between charges, and cannot exist independently of charges/light sources. This is a conclusion drawn from a comprehensive study of all physical phenomena and experimental results related to light. This article focuses on the evidence chain formed by many evidences of the law of interaction between light and media to discuss related issues, in order to correct the current misunderstanding of the nature of light.

光与介质作用后会改变光的所有特征，包括但不限于光的传递方向、光的相位、光的振幅、光的频率、光的波长、光的速度等。但人们对光到底是什么的认识至今仍未能完全统一，有认为光是电磁波的，也有认为光是光子的，更有认为光具有波粒二相性。通过本人长时间的研究发现：光既不是电磁波，也不是光子，更没有波粒二相性。光只是电荷之间才存在的库仑力和磁力的表现形式之一，并不能脱离电荷/光源而独立存在。这是通过对所有与光有关的物理现象与实验结果的全面研究所得出的结论。本文重点以光与介质相互作用规律的诸多证据所形成的证据链来探讨相关问题，以期纠正目前人们对光的本质的错误认识。