deletions | additions       diff --git a/subsection_Johnson_Noise_Johnson_noise__.tex b/subsection_Johnson_Noise_Johnson_noise__.tex  index 64a4d4d..9146932 100644  --- a/subsection_Johnson_Noise_Johnson_noise__.tex  +++ b/subsection_Johnson_Noise_Johnson_noise__.tex 
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\begin{equation}  \label{eq:Equatoin}  V_{\textrm{mean square ac voltage } }}  = = (4 R \Delta f) k_B T}  \end{equation}  or,