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← ScienceWhich signal distortion occurs because of refractive index variation?
A)Gravitational lensing✓
B)Chromatic aberration
C)Signal attenuation
D)Doppler broadening
💡 Explanation
Gravitational lensing occurs because the refractive index distribution causes curvature of spacetime, bending electromagnetic radiation around massive objects. Therefore, light is gravitationally lensed and bends significantly, rather than exhibiting Doppler broadening.
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