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← ScienceWhich mechanism causes an observed gravitational redshift of spectral lines emitted by hot, extremely dense white dwarf stars?
A)Gravitational time dilation✓
B)Increased convective cooling
C)Nuclear fusion fluctuations
D)Relativistic beaming effect
💡 Explanation
Gravitational redshift occurs when light emitted from a strong gravitational field loses energy via gravitational time dilation. Because equivalence dictates gravity warps spacetime around the star, therefore the redshift increases, rather than other mechanisms influencing emitted wavelength.
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