Gravitational lensing (a) occurs when light passes near a massive object and is deflected by the object's gravitational field.(b) occurs when the mass of a galaxy is greater than expected from the luminosity of the galaxy.(c) can be used to determine the recessional velocity of a galaxy.(d) can be used to determine the luminosity of a galaxy.
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Gravitational lensing (a) occurs when light passes near a massive object and is deflected by the ob...
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