Typos fixed, thanks to Dean

1 files changed, 3 insertions, 3 deletions

diff --git a/pe-effect.tex b/pe-effect.tex
index 963af5e..7c733c8 100644
--- a/pe-effect.tex
+++ b/pe-effect.tex
@@ -78,7 +78,7 @@ for the emission of electrons with particular spin. See: www.jlab.org
 \section*{Procedure}
 
 \textbf{Equipment needed}: Pasco photo-electric apparatus, Hg lamp, digital
-voltmeter. The Pasco apparatus contains a circuit which automatically determines the stopping potential, which you measure off of a voltmeter, so there is no need to adjust the stopping potential yourself or measuring the current (lucky you!). Read the brief description of its operation in the appendix.
+voltmeter. The Pasco apparatus contains a circuit which automatically determines the stopping potential, which you measure off of a voltmeter, so there is no need to adjust the stopping potential yourself or measure the current (lucky you!). Read the brief description of its operation in the appendix.
 
 \begin{figure}
 \centering \includegraphics[width=\linewidth]{./pdf_figs/pefig3} \caption{\label{pefig3}
@@ -194,7 +194,7 @@ Use  the table in Fig.~\ref{fig:mercury_spectrum} to find the exact frequencies
 
 \section*{Appendix: Operation principle of the stopping potential detector}
 
-The schematics of the apparatus used to measure the stopping potential is shown in Fig.~\ref{pefig5}. Monochromatic light falls on the cathode plate of a vacuum photodiode tube that has a low work function $\phi$. Photoelectrons ejected from the cathode collect on the anode. The photodiode tube and its associated electronics have a small capacitance which becomes charged by the photoelectric current. When the potential on this capacitance reaches the stopping potential of the photoelectrons, the current decreases to zero, and the anode-to-cathode voltage stabilizes. This final voltage between the anode and cathode is therefore the stopping potential of the photoelectrons.
+The schematic of the apparatus used to measure the stopping potential is shown in Fig.~\ref{pefig5}. Monochromatic light falls on the cathode plate of a vacuum photodiode tube that has a low work function $\phi$. Photoelectrons ejected from the cathode collect on the anode. The photodiode tube and its associated electronics have a small capacitance which becomes charged by the photoelectric current. When the potential on this capacitance reaches the stopping potential of the photoelectrons, the current decreases to zero, and the anode-to-cathode voltage stabilizes. This final voltage between the anode and cathode is therefore the stopping potential of the photoelectrons.
 \begin{figure}[h]
 \centering \includegraphics[width=0.7\linewidth]{./pdf_figs/pe_det}
 \caption{\label{pefig5} The electronic schematic diagram of the $h/e$
@@ -209,7 +209,7 @@ front panel of the apparatus. This high impedance, unity gain ($V_{out}/V_{in}
 voltmeter.
 
 Due to the ultra high input impedance, once the capacitor has been charged from
-the photodiode current it takes a long time to discharge this potential through
+the photodiode current, it takes a long time to discharge this potential through
 some leakage. Therefore a shorting switch labeled ``PUSH TO Zero'' enables the
 user to quickly bleed off the charge.
 \newpage