Muster Mark Posted August 31, 2021 Share Posted August 31, 2021 Light from distant objects is being stretched by the expansion of the universe, such that light that was ie blue (short wavelength) gets shifted to red (long wavelength). As short wavelength light has inherently more energy than long wavelength light, and as energy cannot be destroyed, where does the lost energy go when light is redshifted? TY! 1 Link to comment Share on other sites More sharing options...
SergUpstart Posted August 31, 2021 Share Posted August 31, 2021 2 hours ago, Muster Mark said: Light from distant objects is being stretched by the expansion of the universe, such that light that was ie blue (short wavelength) gets shifted to red (long wavelength). As short wavelength light has inherently more energy than long wavelength light, and as energy cannot be destroyed, where does the lost energy go when light is redshifted? TY! Look at the model of the universe with zero energy. https://en.wikipedia.org/wiki/Zero-energy_universe The energy of photons in the Universe decreases and at the same time its gravitational energy decreases. Link to comment Share on other sites More sharing options...
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