摘要
假设光子质量不为零,最直接的物理效应是真空中的光速不再是不变的,随频率的增大,光速的上限等于常数c.理论上,这一假设面对的一个困难是,它不能令人信服地回答,随着频率的减小,光速应该怎样变化.应用量子电动力学中已有的理论成果,该文指出,即使光子的质量不为零,随着频率的减小,光速也不会无限地变小并趋近于零,而是有一个仅仅略低于常数c的、确定的下限值(0.89c).进而推论,光速的下限(0.89c)就是静电场的传播速度.
A direct effect of the hypothesis of nonzero photon mass is that the velocity of light in vacuum would not be invariant and its upper limit would equal the constant c as the frequency increases. However, the hypothesis of nonzero photon mass is faced with a theoretical difficulty that it can not satisfyingly answer how the velocity of light would vary with the decreasing of photon＇s frequency. Based on the relation between photon mass λ and minimum frequency ωmin, which was derived in quantum electro - dynamics, it is pointed out that as the frequency decreases the velocity of light would not be close to zero without limit but have a definite lower limit （ ≌ 0.89 c）, i.e. a little lower than constant c, and that the velocity, with which the static fields propagate in vacuum, must be equal to the lower limit of the velocity of light （ ≌0.89 c）.
出处
《华南师范大学学报（自然科学版）》
CAS
2008年第1期67-70,共4页
Journal of South China Normal University(Natural Science Edition)
关键词
光子质量
频率最小值
光速的下限≌0.89
c
photon mass
minimum frequency
lower limit of the velocity of light （≌0.89 c）
