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Which mechanism increases receiver noise in radio astronomy?

A)Atmospheric microwave absorption
B)Cosmic ray interference
C)Magneto-hydrodynamic turbulence
D)Neutrino interaction events

💡 Explanation

Atmospheric microwave absorption increases thermal noise because water vapor selectively absorbs microwave radiation via dipole rotation. Therefore, signal power decreases due to decreased signal-to-noise, rather than other forms of particle interference at radio frequencies.

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