Answer to Question #55059 in Astronomy | Astrophysics for Lia

Question #55059
Since the optical depth for free-free absorption is proportional to v−2.1 while T is independent
of frequency, there must be some frequency above which Thomson scattering in the ISM reduces the observed flux density of an extragalactic point source more than free-free absorption does. Estimate that frequency.
1
Expert's answer
2015-10-08T00:00:44-0400
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