diff --git a/4.7.2-pockels-effect/Untitled.ipynb b/4.7.2-pockels-effect/Untitled.ipynb
new file mode 100644
index 0000000..42e7b71
--- /dev/null
+++ b/4.7.2-pockels-effect/Untitled.ipynb
@@ -0,0 +1,140 @@
+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "id": "a1e0c9d5-9e18-499c-b986-00b384691085",
+   "metadata": {},
+   "source": [
+    "кристалл 3x3x26mm $\\text{LiNiO}_3$\n",
+    "\n",
+    "$\\lambda = 630$ nm\n",
+    "\n",
+    "$n_0 = 2.29$"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "207d3fe9-b468-46eb-bef7-eed6aa07d3ae",
+   "metadata": {},
+   "source": [
+    "$L = 637\\pm1$ mm"
+   ]
+  },
+  {
+   "cell_type": "raw",
+   "id": "ed1dbc1b-0580-4c7e-a0a6-011d0d1680b0",
+   "metadata": {},
+   "source": [
+    "2r\n",
+    "47\n",
+    "65\n",
+    "81\n",
+    "92\n",
+    "103\n",
+    "113"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "6b36bceb-3b08-48e3-90dd-16fb55fd7d90",
+   "metadata": {},
+   "source": [
+    "For 90 deg (314 deg)\n",
+    "\n",
+    "$U_{\\lambda/2} = 390 \\pm 15$ V\n",
+    "\n",
+    "$U_{\\lambda} = 810 \\pm 15$ V\n",
+    "\n",
+    "$U_{3\\lambda/2} = 1230 \\pm 15$ V"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "022be70a-84f4-4de8-bfff-9a459a7bcc70",
+   "metadata": {},
+   "source": [
+    "For 0 deg (44 deg)\n",
+    "\n",
+    "не удалось увидеть (слабо меняется)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 1,
+   "id": "7ac90403-b282-4c23-a969-0a91cf30d10d",
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "405.0"
+      ]
+     },
+     "execution_count": 1,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "(390 + 810 + 1230) / 6"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "515cd5ed-241a-4132-a42c-b918e769c194",
+   "metadata": {},
+   "source": [
+    "6 п -- круговая поляризация (???)"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "aa9a0479-67df-4fb7-a73a-d730e884f53e",
+   "metadata": {},
+   "source": [
+    "переменка\n",
+    "\n",
+    "400\n",
+    "\n",
+    "тд + фото"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "11cc86ab-bf25-4511-81ad-831bf2d92bb4",
+   "metadata": {},
+   "source": [
+    "при переходе к параллельной поляризации получается линия"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "255dc6f7-f011-4334-a981-356cf0e8fe58",
+   "metadata": {},
+   "outputs": [],
+   "source": []
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 3 (ipykernel)",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.10.2"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 5
+}