diff --git a/notes/.obsidian/plugins/obsidian-activity-history/data.json b/notes/.obsidian/plugins/obsidian-activity-history/data.json
index ff5a5ef..cbbe901 100644
--- a/notes/.obsidian/plugins/obsidian-activity-history/data.json
+++ b/notes/.obsidian/plugins/obsidian-activity-history/data.json
@@ -13,7 +13,7 @@
     {
       "path": "/",
       "date": "2023-09-21",
-      "size": 1435823
+      "size": 1435874
     }
   ],
   "activityHistory": [
@@ -1346,7 +1346,7 @@
         },
         {
           "date": "2023-09-21",
-          "value": 20593
+          "value": 20644
         }
       ]
     }
diff --git a/notes/fyz/Svetlo/Odraz světla.md b/notes/fyz/Svetlo/Odraz světla.md
index 03beccf..6c6dd84 100644
--- a/notes/fyz/Svetlo/Odraz světla.md	
+++ b/notes/fyz/Svetlo/Odraz světla.md	
@@ -88,3 +88,9 @@ $x=40cm$
 
 $x_2=x-x_1$
 $x_2=15cm$
+
+
+---
+
+Určete úhel dopadu světla na rozhraní vody ($n_v = 1.33$) a skla ($n_s = 1,5$), svírá-li odražený paprsek s paprskem lomeným úhel $120\degree$.
+