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Which observation validates gravitational lensing arising from spacetime curvature?

A)Distant galaxies appear distorted
B)Redshift increases with distance
C)Cosmic microwave background is uniform
D)Supernovae Ia have consistent luminosity

💡 Explanation

Gravitational lensing validates curvature because the Shapiro delay alters photon trajectories around massive objects, therefore distant galaxies appear distorted, rather than exhibiting redshift variation due to expansion or cosmic background isotropy.

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