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Primary properties of light are intensity, propagation direction, frequency or wavelength spectrum, and polarisation, while its speed in a vacuum, 299,792,458 meters per second (about 300,000 kilometers per second), is one of the fundamental constants of nature. Cities in dialogue Photo 1: (Fiat lux  |  London  |  R.Cambusano ) Photo 2: (blue light_in  |  London…