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Science-Related Homework Help Physics Topic started by: symbo on Mar 21, 2017



Title: For an astronomer, what is the “water hole”?(a)A range of noise-free frequencies between the ...
Post by: symbo on Mar 21, 2017
For an astronomer, what is the “water hole”?

(a)   A range of noise-free frequencies between the microwave emission lines of hydrogen and hydroxyl
(b)   A range of noise-free frequencies near the 21-cm emission line of hydrogen
(c)   A gathering place for gnus


Title: Re: For an astronomer, what is the “water hole”?(a)A range of noise-free frequencies between the ...
Post by: discoverer on Mar 21, 2017
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