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27 min temu · where c=2.99793 ∙ 10 8 m/s is the speed of light in vacuum; h = 6.62517 ∙ 10 −34 J ∙ s is Planck’s constant; k = 1.38044 ∙ 10 −23 J/K is the Boltzmann constant; and λ is the wavelength of the emitted radiation (in meters). Formula (), which describes the radiation of a blackbody, was obtained by Max Planck on the basis of quantum conception and is called Planck’s law ...
1 dzień temu · The Moon is Earth's only natural satellite.It orbits at an average distance of 384,400 km (238,900 mi), about 30 times the diameter of Earth. Tidal forces between Earth and the Moon have over time synchronized the Moon's orbital period (lunar month) with its rotation period at 29.5 Earth days, causing the same side of the Moon to always face Earth. . The Moon's gravitational pull – and to a ...
