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中文摘要：
讨论了弯曲时空下，当光子静止质量不为零时引力的时间延迟效应，即光子静止质量对在地球上发射再从行星上反射回来的掠过太阳的雷达回波延迟的影响．计算了当光子静止质量不为零时对原有电磁波运动方程的影响，并将实验所得数据与理论计算数据之间的误差归结为光子静止质量引起，由火星回波延迟的实验数据给出光子静止质量上限为2．2×10^-43g．同时讨论了实验中误差的来源，并提出了进一步提高实验精度和获得光子静止质量更高上限的途径．
英文摘要：
Discussed was the influence of photon rest mass on the delay of the radar echo which was sent from the earth and was reflected from the plant in the gravitational field of the sun, when the photon rest mass did not equal to zero in the curved time-space. The influence of the photon with nonzero rest mass was calculated on the motion equations of electromagnetic wave. With Mars as the reflection point, based on the current deviations between the measured radar echo delay and the calculated one a upper limit on the photon mass can be derived as 2.2×10^-43 g. Finally, by discussing the error sources in the experiments, several approach of improvement were mentioned.
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