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Which observational artifact appears because differential spacetime curvature near coalescing black holes?

A)Gravitational waves are red-shifted
B)Accretion disk is asymmetrically broadened
C)Hawking radiation is anisotropic
D)Frame-dragging effect vanishes completely

💡 Explanation

The accretion disk asymmetry occurs because **gravitational lensing** non-uniformly magnifies different parts of the disk due to curvature. Therefore, the disk appears broadened on one side, rather than being uniformly distorted due to cosmological redshift.

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