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| Description: Expanding universe Most galaxies exhibit a red Doppler shift Moving away Far galaxies have greatest shift Doppler effect Change in the wavelength of light emitted by an object due to its motion Movement away stretches the wavelength Longer wavelength Light appears redder Movement toward “squeezes” the wavelength Shorter wavelength Light shifted toward the blue Amount of the Doppler shift indicates the rate of movement Large Doppler shift indicates a high velocity Small Doppler shift indicates a lower velocity Picture Stats: Views: 256 Filesize: 471.8kB Height: 596 Width: 891 Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=39673 |