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23 Nov 2019
Radio Astronomers detected the 21-cm line of neutral hydrogen (H I regions) when looking through the local spiral arm of thickness L = 1kpc and hydrogen atom number density of Nh= 10^7 (m^-3), How many spin transitions, Nt, were detected in a cross sectional area of 1m^2 in 10 minutes?
Radio Astronomers detected the 21-cm line of neutral hydrogen (H I regions) when looking through the local spiral arm of thickness L = 1kpc and hydrogen atom number density of Nh= 10^7 (m^-3), How many spin transitions, Nt, were detected in a cross sectional area of 1m^2 in 10 minutes?
