Task id13790
If we assume that the photon mass mg = / = 0, then the speed of electromagnetic waves in vacuum will depend on the wavelength l. To date, based on location measurements of the average distance L between the Moon and the Earth (L = 3.5 x 105 km), such a dependence has not been discovered. The measurements were carried out in the centimeter (l = 20 cm) and optical ranges. Their accuracy was determined mainly by the roughness of the lunar surface dL = ± 100 m. Based on these data, estimate the possible upper limit of the rest mass phot
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