diff --git a/pdf/riflessione-rifrazione.pdf b/physics/pdf/riflessione-rifrazione.pdf
similarity index 99%
rename from pdf/riflessione-rifrazione.pdf
rename to physics/pdf/riflessione-rifrazione.pdf
index bbe2b90..7190893 100644
Binary files a/pdf/riflessione-rifrazione.pdf and b/physics/pdf/riflessione-rifrazione.pdf differ
diff --git a/physics/pdf/risposta_coni.pdf b/physics/pdf/risposta_coni.pdf
new file mode 100644
index 0000000..7ade4a5
Binary files /dev/null and b/physics/pdf/risposta_coni.pdf differ
diff --git a/riflessione-rifrazione.tex b/physics/riflessione-rifrazione.tex
similarity index 92%
rename from riflessione-rifrazione.tex
rename to physics/riflessione-rifrazione.tex
index a3e2797..2f9c082 100644
--- a/riflessione-rifrazione.tex
+++ b/physics/riflessione-rifrazione.tex
@@ -11,7 +11,7 @@
 \title{Rifrazione e riflessione}
 \begin{document}
 	\tikzset{partial ellipse/.style args = {#1:#2:#3}{insert path={+ (#1:#3) arc (#1:#2:#3)}}}
-	\begin{tikzpicture}%[y=.2cm, x=.7cm,font=\sffamily]%[background rectangle/.style={fill=space},show background rectangle]
+	\begin{tikzpicture}
 		%
 		\draw (-8,8) -- (8,8) -- (8,-8) -- (-8,-8) -- (-8,8);
 		\draw[fill=earth, opacity=0.7] (-8,0) -- (8,0) -- (8,-8) -- (-8,-8) -- (-8,0);
diff --git a/risposta_coni.tex b/physics/risposta_coni.tex
similarity index 95%
rename from risposta_coni.tex
rename to physics/risposta_coni.tex
index e87b219..9ef7260 100644
--- a/risposta_coni.tex
+++ b/physics/risposta_coni.tex
@@ -8,14 +8,13 @@
 \usepackage{fontspec}
 \setmainfont{Montserrat}
 %
-%source https://tex.stackexchange.com/questions/11368/bell-curve-gaussian-function-normal-distribution-in-tikz-pgf
 \usepackage{pgfplots}
 \pgfplotsset{width=7cm,compat=1.8}
 \pgfmathdeclarefunction{gauss}{2}{%
 	\pgfmathparse{1/(#2*sqrt(2*pi))*exp(-((x-#1)^2)/(2*#2^2))}%
 }
 %
-\title{Risposta relativa dei coni}
+\title{Risposta relativa dei coni dell'occhio}
 \begin{document}
 	\begin{tikzpicture}
 		%